Liabilities / Assets
70th percentile
Higher debt load relative to assets than 70% of similar nonprofits.
EIN 52-0614282 • 501(c)3 • Centreville, MD
Profile
The gunston school is a college preparatory, co-educational, private high school for grades 9-12.
Precomputed percentiles relative to similar nonprofits. These scores are descriptive rather than judgmental.
Liabilities / Assets
70th percentile
Higher debt load relative to assets than 70% of similar nonprofits.
Liabilities / Revenue
75th percentile
Higher debt load relative to revenue than 75% of similar nonprofits.
Net Margin
21st percentile
Higher net margin than 21% of similar nonprofits.
Top Officer Pay
Score unavailable
No filing with officer rows is available for this organization yet.
Asset Growth
22nd percentile
Faster asset growth than 22% of similar nonprofits.
Revenue Growth
8th percentile
Faster revenue growth than 8% of similar nonprofits.
Assets
Down$11,862,104
Down $341,651 (-2.8%) from 2023
Liabilities
Up$4,726,597
Up $30,243 (+0.6%) from 2023
Net Assets
Down$7,135,507
Down $371,894 (-5.0%) from 2023
Revenue
Down$6,841,272
Down $3,191,898 (-32%) from 2023
Expenses
Down$7,318,057
Down $1,305,329 (-15%) from 2023
Net Income
Down-$476,785
Down $1,886,569 (-134%) from 2023
Most recent year
2024 • Form 990Detailed filing. Detailed filing data is available for this year.
The gunston school is a college preparatory, co-edcuational, private high school for grades 9-12.
The gunston school is a college preparatory, co-educational, private high school for grades 9-12.
| Line | Beginning | End | Change |
|---|---|---|---|
| Assets | |||
| Land, Buildings, and Equipment, Net | $8,795,843 | $8,577,682 | ▼ $218,161 |
| Pledges and Grants Receivable | $1,141,225 | $1,225,925 | ▲ $84,700 |
| Investments in Publicly Traded Securities | $1,094,285 | $1,209,665 | ▲ $115,380 |
| Cash and Non-Interest-Bearing Accounts | $1,026,265 | $652,844 | ▼ $373,421 |
| Prepaid Expenses and Deferred Charges | $132,421 | $116,113 | ▼ $16,308 |
| Accounts Receivable | $43,884 | $58,080 | ▲ $14,196 |
| Savings and Temporary Cash Investments | $15,351 | $15,841 | ▲ $490 |
| Inventories for Sale or Use | $8,060 | $5,954 | ▼ $2,106 |
| Total Assets | $12,257,334 | $11,862,104 | ▼ $395,230 |
| Liabilities | |||
| Tax Exempt Bond Liabilities | $2,163,690 | $2,139,851 | ▼ $23,839 |
| Mortgage Notes Payable Secured by Investment Property | $1,316,982 | $1,243,993 | ▼ $72,989 |
| Deferred Revenue | $1,134,910 | $1,154,088 | ▲ $19,178 |
| Accounts Payable and Accrued Expenses | $80,772 | $188,665 | ▲ $107,893 |
| Total Liabilities | $4,696,354 | $4,726,597 | ▲ $30,243 |
| Net Assets / Fund Balance | |||
| Net Assets Without Donor Restrictions | $6,078,708 | $5,555,137 | ▼ $523,571 |
| Net Assets With Donor Restrictions | $1,482,272 | $1,580,370 | ▲ $98,098 |
| Total Net Assets Fund Balance | $7,560,980 | $7,135,507 | ▼ $425,473 |
| Total Liabilities and Net Assets / Fund Balance | $12,257,334 | $11,862,104 | ▼ $395,230 |
| Asset | Book Value | Depreciation | Basis |
|---|---|---|---|
| Buildings | $6,241,934 | $4,416,869 | $10,658,803 |
| Equipment | $542,933 | $1,570,026 | $2,112,959 |
| Land | $1,302,328 | - | $1,302,328 |
| Other Land Buildings | $490,487 | $595,716 | $1,086,203 |
| Period | Beginning | Contrib. | Gain/Loss | Other Uses | End |
|---|---|---|---|---|---|
| 2023 | $508,225 | - | - | $27,339 | $480,886 |
| 2022 | $506,773 | $25,000 | - | $23,548 | $508,225 |
| 2021 | $496,802 | $25,000 | ▼ $10,762 | $4,267 | $506,773 |
| 2020 | $498,525 | $25,000 | ▼ $9,709 | $17,014 | $496,802 |
| 2019 | $491,449 | $25,000 | ▼ $8,713 | $9,211 | $498,525 |
| Name | Title | Full / Part Time | Base | Other | Total |
|---|---|---|---|---|---|
| John Lewis | - | - | $191,028 | $21,395 | $212,423 |
| John Lewis | Head of School | FT | $191,028 | $21,394 | $212,422 |
| Melissa Haber | Chief Financial Officer | FT | $132,218 | $6,563 | $138,781 |
| Christie Grabis | Assistant Head of School | FT | $126,641 | $6,246 | $132,887 |
| Name | Title |
|---|---|
| Joe Janney | Chair |
| Patricia Parkhurst | Vice Chair |
| Betsy Mccown | Trustee |
| Chris Mcclary | Trustee |
| Dr Nina Wagner-johnston | Trustee |
| Fernando Deleon | Trustee |
| Greg Farley | Trustee |
| James Shifrin | Trustee |
| Jeffrey Frederick | Trustee |
| Jill Caron | Trustee |
| Patrick Shoemaker | Trustee |
| Rick De Los Reyes | Trustee |
| Megan Cook | Secretary |
| Isabel Hardesty | Treasurer |
| Line Item | Amount |
|---|---|
| Salaries, Compensation, and Employee Benefits | $4,349,476 |
| Other Expenses | $2,968,581 |
| Total Fundraising Expense | $1,070,088 |
| Grants and Similar Amounts Paid | $0 |
| Professional Fundraising Fees | $0 |
| Line Item | Program | Management | Fundraising | Total |
|---|---|---|---|---|
| Other Salaries and Wages | $2,729,066 | $310,779 | $296,882 | $3,336,727 |
| All Other Expenses | $377,435 | $83,944 | $39,717 | $501,096 |
| Depreciation Depletion | $388,032 | $45,651 | $22,825 | $456,508 |
| Other Employee Benefits | $201,539 | $105,319 | $52,896 | $359,754 |
| Payroll Taxes | $146,262 | $79,779 | $39,890 | $265,931 |
| Current Officers, Directors, Trustees, and Key Employees | $63,150 | $136,825 | $63,150 | $263,125 |
| Other Expenses | $230,000 | $0 | $0 | $230,000 |
| Office Expenses | $2,637 | $122,497 | $25,892 | $151,026 |
| Interest | $110,989 | $13,058 | $6,529 | $130,576 |
| Pension Plan Contributions | $71,495 | $34,819 | $17,625 | $123,939 |
| Occupancy | $96,083 | $11,304 | $5,653 | $113,040 |
| Fees for Services Other | $15,842 | $88,811 | $0 | $104,653 |
| Insurance | $0 | $70,631 | $0 | $70,631 |
| Travel | $63,152 | $2,879 | $733 | $66,764 |
| Fees for Service Investment Mgmnt Fees | $0 | $11,300 | $0 | $11,300 |
| Advertising | $4,020 | $0 | $0 | $4,020 |
| Total Functional Expenses | $5,105,307 | $1,142,662 | $1,070,088 | $7,318,057 |
| Line Item | Amount |
|---|---|
| Total Expenses per Audited Statements | $7,319,051 |
| Total Expenses per Form 990 | $7,318,057 |
| Expenses per Audited Statements | $7,306,757 |
| Expenses Not Reported on Form 990 | $12,294 |
| Expenses Not Reported on Financial Statements | $11,300 |
| Line Item | Amount |
|---|---|
| Fundraising Direct Expenses | $62,719 |
| Fundraising Gross Income | $23,155 |
| Professional Fundraising Fees | $0 |
| Event | Gross Receipts | Gross Revenue | Direct Expenses | Net Income |
|---|---|---|---|---|
| Bull Roast | $93,190 | $12,045 | $9,835 | $2,210 |
| Golf Tournamnet | $32,974 | $9,865 | - | $9,865 |
| Total Events | $133,299 | $23,155 | $62,719 | $-39,564 |
| Bond | Issuer | Issued | Issue Price | Purpose |
|---|---|---|---|---|
| A | The Town Council of Centreville | 2014-09-25 | $3,934,108 | CONSTRUCTION |
| Bond | Total Proceeds | Spent | Retired | Issuance Costs |
|---|---|---|---|---|
| A | $3,934,108 | - | $1,700,145 | $143,735 |
“The treasurer provides all board members with a copy of the form 990 seven days before it is intended to be mailed. If the treasurer receives no responses from the board members he assumes that the form 990 has been approved and mails it.”
“At the beginning of each board meeting, attendees are asked if they have any conflicts of interest.”
“The board searches nais and aims databases to get comparable wages based on school types and sizes and job descriptions and are adjusted for the school area.”
“The board searches nais and aims databases to get comparable wages based on school types and sizes and job descriptions and are adjusted for the school area.”
“All documents are available in the business office. The form 990 is also filed electronically on guidestar.”
“The school is a non-profit organization and is exempt from federal income taxes under section 501(c)(3) of the internal revenue code. Therefore, contributions to the school are tax-deductible under section 170 of the internal revenue code. The school adopted the recommendations of the financial accounting standards board (fasb) in its accounting standards codification (asc) for accounting of uncertainty in income taxes without any material effect to the financial statements. These recommendations clarify the acounting for uncertainty in income taxes by prescribing the recognition threshold a tax position is required to meet before being recognized in the financial statements. They also provide guidance on de-recognition, classification, interest and penalties, accounting in interim periods, disclosure, and transition. Income tax benefits are recognized for income tax positions taken or expected to be taken in a tax return, only when it is determined that the income tax position will more-likely-than-not be sustained upon examination by taxing authorities. The school has analyzed tax positions taken for filing with the internal revenue service and all state jurisdictions where it operates. Management believes that income tax filing positions will be sustained upon examination and does not anticipate any adjustments that would result in a material adverse affect on the schools financial condition, results of operations or cash flows. Accordingly, the school has not recorded any reserves, or related accruals for interest and penalties for uncertain income tax positions at june 30, 2024 or 2023. The schools returns remain open for three (3) years for federal and state examination.”
“Costs of goods sold included in part viii, line 10b.”
“Costs of goods sold included in part viii, line 10b.”
“The intended use of the endowment fund is to hold the corpus in investments, while using the interest and appropriated amounts deemed by donors for scholarships and operations.”
This appendix keeps the raw XML leaves available for debugging and edge-case review. The human report above is the primary experience.
| Path | # | Value |
|---|---|---|
| IRS990/AccountantCompileOrReviewInd | 0 | false |
| IRS990/AccountsPayableAccrExpnssGrp/BOYAmt | 0 | 80772 |
| IRS990/AccountsPayableAccrExpnssGrp/EOYAmt | 0 | 188665 |
| IRS990/AccountsReceivableGrp/BOYAmt | 0 | 43884 |
| IRS990/AccountsReceivableGrp/EOYAmt | 0 | 58080 |
| IRS990/ActivitiesConductedPrtshpInd | 0 | false |
| IRS990/ActivityOrMissionDesc | 0 | THE GUNSTON SCHOOL IS A COLLEGE PREPARATORY, CO-EDUCATIONAL, PRIVATE HIGH SCHOOL FOR GRADES 9-12. |
| IRS990/AdvertisingGrp/FundraisingAmt | 0 | 0 |
| IRS990/AdvertisingGrp/ManagementAndGeneralAmt | 0 | 0 |
| IRS990/AdvertisingGrp/ProgramServicesAmt | 0 | 4020 |
| IRS990/AdvertisingGrp/TotalAmt | 0 | 4020 |
| IRS990/AllOtherContributionsAmt | 0 | 993272 |
| IRS990/AllOtherExpensesGrp/FundraisingAmt | 0 | 39717 |
| IRS990/AllOtherExpensesGrp/ManagementAndGeneralAmt | 0 | 83944 |
| IRS990/AllOtherExpensesGrp/ProgramServicesAmt | 0 | 377435 |
| IRS990/AllOtherExpensesGrp/TotalAmt | 0 | 501096 |
| IRS990/AnnualDisclosureCoveredPrsnInd | 0 | true |
| IRS990/AuditCommitteeInd | 0 | true |
| IRS990/BackupWthldComplianceInd | 0 | true |
| IRS990/BooksInCareOfDetail/PersonNm | 0 | MELISSA HABER |
| IRS990/BooksInCareOfDetail/PhoneNum | 0 | 4107580620 |
| IRS990/BooksInCareOfDetail/USAddress/AddressLine1Txt | 0 | PO BOX 200 |
| IRS990/BooksInCareOfDetail/USAddress/CityNm | 0 | CENTREVILLE |
| IRS990/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | MD |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 21617 |
| IRS990/BusinessRlnWith35CtrlEntInd | 0 | false |
| IRS990/BusinessRlnWithFamMemInd | 0 | false |
| IRS990/BusinessRlnWithOrgMemInd | 0 | false |
| IRS990/CashNonInterestBearingGrp/BOYAmt | 0 | 1026265 |
| IRS990/CashNonInterestBearingGrp/EOYAmt | 0 | 652844 |
| IRS990/ChangeToOrgDocumentsInd | 0 | false |
| IRS990/CollectionsOfArtInd | 0 | false |
| IRS990/CompCurrentOfcrDirectorsGrp/FundraisingAmt | 0 | 63150 |
| IRS990/CompCurrentOfcrDirectorsGrp/ManagementAndGeneralAmt | 0 | 136825 |
| IRS990/CompCurrentOfcrDirectorsGrp/ProgramServicesAmt | 0 | 63150 |
| IRS990/CompCurrentOfcrDirectorsGrp/TotalAmt | 0 | 263125 |
| IRS990/CompensationFromOtherSrcsInd | 0 | false |
| IRS990/CompensationProcessCEOInd | 0 | true |
| IRS990/CompensationProcessOtherInd | 0 | true |
| IRS990/ConflictOfInterestPolicyInd | 0 | true |
| IRS990/ConservationEasementsInd | 0 | false |
| IRS990/ConsolidatedAuditFinclStmtInd | 0 | false |
| IRS990/ContriRptFundraisingEventAmt | 0 | 110144 |
| IRS990/CostOfGoodsSoldAmt | 0 | 12294 |
| IRS990/CreditCounselingInd | 0 | false |
| IRS990/CYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/CYContributionsGrantsAmt | 0 | 1103416 |
| IRS990/CYGrantsAndSimilarPaidAmt | 0 | 0 |
| IRS990/CYInvestmentIncomeAmt | 0 | 159371 |
| IRS990/CYOtherExpensesAmt | 0 | 2968581 |
| IRS990/CYOtherRevenueAmt | 0 | 417277 |
| IRS990/CYProgramServiceRevenueAmt | 0 | 5161208 |
| IRS990/CYRevenuesLessExpensesAmt | 0 | -476785 |
| IRS990/CYSalariesCompEmpBnftPaidAmt | 0 | 4349476 |
| IRS990/CYTotalExpensesAmt | 0 | 7318057 |
| IRS990/CYTotalFundraisingExpenseAmt | 0 | 1070088 |
| IRS990/CYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/CYTotalRevenueAmt | 0 | 6841272 |
| IRS990/DAFExcessBusinessHoldingsInd | 0 | false |
| IRS990/DecisionsSubjectToApprovaInd | 0 | false |
| IRS990/DeductibleArtContributionInd | 0 | false |
| IRS990/DeductibleNonCashContriInd | 0 | false |
| IRS990/DeferredRevenueGrp/BOYAmt | 0 | 1134910 |
| IRS990/DeferredRevenueGrp/EOYAmt | 0 | 1154088 |
| IRS990/DelegationOfMgmtDutiesInd | 0 | false |
| IRS990/DepreciationDepletionGrp/FundraisingAmt | 0 | 22825 |
| IRS990/DepreciationDepletionGrp/ManagementAndGeneralAmt | 0 | 45651 |
| IRS990/DepreciationDepletionGrp/ProgramServicesAmt | 0 | 388032 |
| IRS990/DepreciationDepletionGrp/TotalAmt | 0 | 456508 |
| IRS990/Desc | 0 | EXPENSES ASSOCIATED WITH PROVIDING AN EDUCATION FOR APPROXIMATELY 242 SECONDARY SCHOOL STUDENTS, INCLUDING TUTORING AND RELATED MUSIC, ATHLETIC ACTIVITIES AND CWS |
| IRS990/DescribedInSection501c3Ind | 0 | true |
| IRS990/DisregardedEntityInd | 0 | false |
| IRS990/DistributionToDonorInd | 0 | false |
| IRS990/DocumentRetentionPolicyInd | 0 | true |
| IRS990/DonorAdvisedFundInd | 0 | false |
| IRS990/DonorRestrictionNetAssetsGrp/BOYAmt | 0 | 1482272 |
| IRS990/DonorRestrictionNetAssetsGrp/EOYAmt | 0 | 1580370 |
| IRS990/DonorRstrOrQuasiEndowmentsInd | 0 | true |
| IRS990/ElectionOfBoardMembersInd | 0 | false |
| IRS990/EmployeeCnt | 0 | 82 |
| IRS990/EmploymentTaxReturnsFiledInd | 0 | true |
| IRS990/EngagedInExcessBenefitTransInd | 0 | false |
| IRS990/EscrowAccountInd | 0 | false |
| IRS990/ExpenseAmt | 0 | 5105307 |
| IRS990/FamilyOrBusinessRlnInd | 0 | false |
| IRS990/FederalGrantAuditRequiredInd | 0 | false |
| IRS990/FeesForServicesOtherGrp/FundraisingAmt | 0 | 0 |
| IRS990/FeesForServicesOtherGrp/ManagementAndGeneralAmt | 0 | 88811 |
| IRS990/FeesForServicesOtherGrp/ProgramServicesAmt | 0 | 15842 |
| IRS990/FeesForServicesOtherGrp/TotalAmt | 0 | 104653 |
| IRS990/FeesForSrvcInvstMgmntFeesGrp/FundraisingAmt | 0 | 0 |
| IRS990/FeesForSrvcInvstMgmntFeesGrp/ManagementAndGeneralAmt | 0 | 11300 |
| IRS990/FeesForSrvcInvstMgmntFeesGrp/ProgramServicesAmt | 0 | 0 |
| IRS990/FeesForSrvcInvstMgmntFeesGrp/TotalAmt | 0 | 11300 |
| IRS990/ForeignActivitiesInd | 0 | false |
| IRS990/ForeignFinancialAccountInd | 0 | false |
| IRS990/ForeignOfficeInd | 0 | false |
| IRS990/Form8282PropertyDisposedOfInd | 0 | false |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 0 | 60.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 1 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 2 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 3 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 4 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 5 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 6 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 7 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 8 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 9 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 10 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 11 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 12 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 13 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 14 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 15 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 16 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 2 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 3 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 4 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 5 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 6 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 7 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 8 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 9 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 10 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 11 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 12 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 13 | X |
| IRS990/Form990PartVIISectionAGrp/KeyEmployeeInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 2 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 3 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 4 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 5 | X |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 0 | 21394 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 1 | 6563 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 2 | 6246 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 4 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 5 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 6 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 7 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 8 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 9 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 10 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 11 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 12 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 13 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 14 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 15 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 16 | 0 |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 0 | JOHN LEWIS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 1 | MELISSA HABER |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 2 | CHRISTIE GRABIS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 3 | JOE JANNEY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 4 | PATRICIA PARKHURST |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 5 | ISABEL HARDESTY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 6 | MEGAN COOK |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 7 | JILL CARON |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 8 | RICK DE LOS REYES |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 9 | CHRIS MCCLARY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 10 | DR NINA WAGNER-JOHNSTON |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 11 | FERNANDO DELEON |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 12 | GREG FARLEY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 13 | JAMES SHIFRIN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 14 | BETSY MCCOWN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 15 | JEFFREY FREDERICK |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 16 | PATRICK SHOEMAKER |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 0 | 191028 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 1 | 132218 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 2 | 126641 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 4 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 5 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 6 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 7 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 8 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 9 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 10 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 11 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 12 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 13 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 14 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 15 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 16 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 4 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 5 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 6 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 7 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 8 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 9 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 10 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 11 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 12 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 13 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 14 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 15 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 16 | 0 |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 0 | HEAD OF SCHOOL |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 1 | CHIEF FINANCIAL OFFICER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 2 | ASSISTANT HEAD OF SCHOOL |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 3 | CHAIR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 4 | VICE CHAIR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 5 | TREASURER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 6 | SECRETARY |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 7 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 8 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 9 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 10 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 11 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 12 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 13 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 14 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 15 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 16 | TRUSTEE |
| IRS990/Form990ProvidedToGvrnBodyInd | 0 | true |
| IRS990/FormationYr | 0 | 1956 |
| IRS990/FormerOfcrEmployeesListedInd | 0 | false |
| IRS990/FSAuditedBasisGrp/SeparateBasisFinclStmtInd | 0 | X |
| IRS990/FSAuditedInd | 0 | true |
| IRS990/FundraisingActivitiesInd | 0 | true |
| IRS990/FundraisingAmt | 0 | 110144 |
| IRS990/FundraisingDirectExpensesAmt | 0 | 62719 |
| IRS990/FundraisingGrossIncomeAmt | 0 | 23155 |
| IRS990/GainOrLossGrp/OtherAmt | 0 | -1793 |
| IRS990/GamingActivitiesInd | 0 | false |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 14 |
| IRS990/GrantAmt | 0 | 0 |
| IRS990/GrantsToIndividualsInd | 0 | false |
| IRS990/GrantsToOrganizationsInd | 0 | false |
| IRS990/GrantToRelatedPersonInd | 0 | false |
| IRS990/GrossAmountSalesAssetsGrp/OtherAmt | 0 | 0 |
| IRS990/GrossReceiptsAmt | 0 | 6918078 |
| IRS990/GrossSalesOfInventoryAmt | 0 | 21635 |
| IRS990/GroupReturnForAffiliatesInd | 0 | false |
| IRS990/IncludeFIN48FootnoteInd | 0 | true |
| IRS990/IndependentAuditFinclStmtInd | 0 | true |
| IRS990/IndependentVotingMemberCnt | 0 | 14 |
| IRS990/IndivRcvdGreaterThan100KCnt | 0 | 3 |
| IRS990/IndoorTanningServicesInd | 0 | false |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
| IRS990/InsuranceGrp/FundraisingAmt | 0 | 0 |
| IRS990/InsuranceGrp/ManagementAndGeneralAmt | 0 | 70631 |
| IRS990/InsuranceGrp/ProgramServicesAmt | 0 | 0 |
| IRS990/InsuranceGrp/TotalAmt | 0 | 70631 |
| IRS990/InterestGrp/FundraisingAmt | 0 | 6529 |
| IRS990/InterestGrp/ManagementAndGeneralAmt | 0 | 13058 |
| IRS990/InterestGrp/ProgramServicesAmt | 0 | 110989 |
| IRS990/InterestGrp/TotalAmt | 0 | 130576 |
| IRS990/InventoriesForSaleOrUseGrp/BOYAmt | 0 | 8060 |
| IRS990/InventoriesForSaleOrUseGrp/EOYAmt | 0 | 5954 |
| IRS990/InvestmentIncomeGrp/ExclusionAmt | 0 | 161164 |
| IRS990/InvestmentIncomeGrp/TotalRevenueColumnAmt | 0 | 161164 |
| IRS990/InvestmentIncomeGrp/UnrelatedBusinessRevenueAmt | 0 | 0 |
| IRS990/InvestmentInJointVentureInd | 0 | false |
| IRS990/InvestmentsPubTradedSecGrp/BOYAmt | 0 | 1094285 |
| IRS990/InvestmentsPubTradedSecGrp/EOYAmt | 0 | 1209665 |
| IRS990/InvestTaxExemptBondsInd | 0 | false |
| IRS990/IRPDocumentCnt | 0 | 33 |
| IRS990/IRPDocumentW2GCnt | 0 | 0 |
| IRS990/LandBldgEquipAccumDeprecAmt | 0 | 6582611 |
| IRS990/LandBldgEquipBasisNetGrp/BOYAmt | 0 | 8795843 |
| IRS990/LandBldgEquipBasisNetGrp/EOYAmt | 0 | 8577682 |
| IRS990/LandBldgEquipCostOrOtherBssAmt | 0 | 15160293 |
| IRS990/LegalDomicileStateCd | 0 | MD |
| IRS990/LessCostOthBasisSalesExpnssGrp/OtherAmt | 0 | 1793 |
| IRS990/LoanOutstandingInd | 0 | false |
| IRS990/LobbyingActivitiesInd | 0 | false |
| IRS990/LocalChaptersInd | 0 | false |
| IRS990/MaterialDiversionOrMisuseInd | 0 | false |
| IRS990/MembersOrStockholdersInd | 0 | false |
| IRS990/MethodOfAccountingAccrualInd | 0 | X |
| IRS990/MinutesOfCommitteesInd | 0 | true |
| IRS990/MinutesOfGoverningBodyInd | 0 | true |
| IRS990/MissionDesc | 0 | THE GUNSTON SCHOOL IS A COLLEGE PREPARATORY, CO-EDUCATIONAL, PRIVATE HIGH SCHOOL FOR GRADES 9-12. |
| IRS990/MoreThan5000KToIndividualsInd | 0 | false |
| IRS990/MoreThan5000KToOrgInd | 0 | false |
| IRS990/MortgNotesPyblScrdInvstPropGrp/BOYAmt | 0 | 1316982 |
| IRS990/MortgNotesPyblScrdInvstPropGrp/EOYAmt | 0 | 1243993 |
| IRS990/NetAssetsOrFundBalancesBOYAmt | 0 | 7560980 |
| IRS990/NetAssetsOrFundBalancesEOYAmt | 0 | 7135507 |
| IRS990/NetGainOrLossInvestmentsGrp/ExclusionAmt | 0 | 0 |
| IRS990/NetGainOrLossInvestmentsGrp/RelatedOrExemptFuncIncomeAmt | 0 | -1793 |
| IRS990/NetGainOrLossInvestmentsGrp/TotalRevenueColumnAmt | 0 | -1793 |
| IRS990/NetGainOrLossInvestmentsGrp/UnrelatedBusinessRevenueAmt | 0 | 0 |
| IRS990/NetIncmFromFundraisingEvtGrp/ExclusionAmt | 0 | -39564 |
| IRS990/NetIncmFromFundraisingEvtGrp/TotalRevenueColumnAmt | 0 | -39564 |
| IRS990/NetIncmFromFundraisingEvtGrp/UnrelatedBusinessRevenueAmt | 0 | 0 |
| IRS990/NetIncomeOrLossGrp/RelatedOrExemptFuncIncomeAmt | 0 | 9341 |
| IRS990/NetIncomeOrLossGrp/TotalRevenueColumnAmt | 0 | 9341 |
| IRS990/NetUnrelatedBusTxblIncmAmt | 0 | 0 |
| IRS990/NetUnrlzdGainsLossesInvstAmt | 0 | 51312 |
| IRS990/NoDonorRestrictionNetAssetsGrp/BOYAmt | 0 | 6078708 |
| IRS990/NoDonorRestrictionNetAssetsGrp/EOYAmt | 0 | 5555137 |
| IRS990/NondeductibleContributionsInd | 0 | false |
| IRS990/OccupancyGrp/FundraisingAmt | 0 | 5653 |
| IRS990/OccupancyGrp/ManagementAndGeneralAmt | 0 | 11304 |
| IRS990/OccupancyGrp/ProgramServicesAmt | 0 | 96083 |
| IRS990/OccupancyGrp/TotalAmt | 0 | 113040 |
| IRS990/OfficeExpensesGrp/FundraisingAmt | 0 | 25892 |
| IRS990/OfficeExpensesGrp/ManagementAndGeneralAmt | 0 | 122497 |
| IRS990/OfficeExpensesGrp/ProgramServicesAmt | 0 | 2637 |
| IRS990/OfficeExpensesGrp/TotalAmt | 0 | 151026 |
| IRS990/OfficerMailingAddressInd | 0 | false |
| IRS990/OnBehalfOfIssuerInd | 0 | false |
| IRS990/OperateHospitalInd | 0 | false |
| IRS990/Organization501c3Ind | 0 | X |
| IRS990/OrganizationFollowsFASB117Ind | 0 | X |
| IRS990/OtherEmployeeBenefitsGrp/FundraisingAmt | 0 | 52896 |
| IRS990/OtherEmployeeBenefitsGrp/ManagementAndGeneralAmt | 0 | 105319 |
| IRS990/OtherEmployeeBenefitsGrp/ProgramServicesAmt | 0 | 201539 |
| IRS990/OtherEmployeeBenefitsGrp/TotalAmt | 0 | 359754 |
| IRS990/OtherExpensesGrp/Desc | 0 | CAPITAL CAMPAIGN |
| IRS990/OtherExpensesGrp/Desc | 1 | SUPPLIES |
| IRS990/OtherExpensesGrp/Desc | 2 | REPAIRS & MAINTENANCE |
| IRS990/OtherExpensesGrp/Desc | 3 | TRANSPORTATION |
| IRS990/OtherExpensesGrp/FundraisingAmt | 0 | 485751 |
| IRS990/OtherExpensesGrp/FundraisingAmt | 1 | 0 |
| IRS990/OtherExpensesGrp/FundraisingAmt | 2 | 12545 |
| IRS990/OtherExpensesGrp/FundraisingAmt | 3 | 0 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 0 | 0 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 1 | 0 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 2 | 25066 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 3 | 0 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 0 | 0 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 1 | 382708 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 2 | 222897 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 3 | 230000 |
| IRS990/OtherExpensesGrp/TotalAmt | 0 | 485751 |
| IRS990/OtherExpensesGrp/TotalAmt | 1 | 382708 |
| IRS990/OtherExpensesGrp/TotalAmt | 2 | 260508 |
| IRS990/OtherExpensesGrp/TotalAmt | 3 | 230000 |
| IRS990/OtherRevenueMiscGrp/BusinessCd | 0 | 900099 |
| IRS990/OtherRevenueMiscGrp/Desc | 0 | OTHER INCOME |
| IRS990/OtherRevenueMiscGrp/ExclusionAmt | 0 | 447500 |
| IRS990/OtherRevenueMiscGrp/RelatedOrExemptFuncIncomeAmt | 0 | 0 |
| IRS990/OtherRevenueMiscGrp/TotalRevenueColumnAmt | 0 | 447500 |
| IRS990/OtherRevenueMiscGrp/UnrelatedBusinessRevenueAmt | 0 | 0 |
| IRS990/OtherRevenueTotalAmt | 0 | 447500 |
| IRS990/OtherSalariesAndWagesGrp/FundraisingAmt | 0 | 296882 |
| IRS990/OtherSalariesAndWagesGrp/ManagementAndGeneralAmt | 0 | 310779 |
| IRS990/OtherSalariesAndWagesGrp/ProgramServicesAmt | 0 | 2729066 |
| IRS990/OtherSalariesAndWagesGrp/TotalAmt | 0 | 3336727 |
| IRS990/PartialLiquidationInd | 0 | false |
| IRS990/PayPremiumsPrsnlBnftCntrctInd | 0 | false |
| IRS990/PayrollTaxesGrp/FundraisingAmt | 0 | 39890 |
| IRS990/PayrollTaxesGrp/ManagementAndGeneralAmt | 0 | 79779 |
| IRS990/PayrollTaxesGrp/ProgramServicesAmt | 0 | 146262 |
| IRS990/PayrollTaxesGrp/TotalAmt | 0 | 265931 |
| IRS990/PensionPlanContributionsGrp/FundraisingAmt | 0 | 17625 |
| IRS990/PensionPlanContributionsGrp/ManagementAndGeneralAmt | 0 | 34819 |
| IRS990/PensionPlanContributionsGrp/ProgramServicesAmt | 0 | 71495 |
| IRS990/PensionPlanContributionsGrp/TotalAmt | 0 | 123939 |
| IRS990/PledgesAndGrantsReceivableGrp/BOYAmt | 0 | 1141225 |
| IRS990/PledgesAndGrantsReceivableGrp/EOYAmt | 0 | 1225925 |
| IRS990/PoliticalCampaignActyInd | 0 | false |
| IRS990/PrepaidExpensesDefrdChargesGrp/BOYAmt | 0 | 132421 |
| IRS990/PrepaidExpensesDefrdChargesGrp/EOYAmt | 0 | 116113 |
| IRS990/PrincipalOfficerNm | 0 | JOHN A LEWIS IV |
| IRS990/ProfessionalFundraisingInd | 0 | false |
| IRS990/ProgramServiceRevenueGrp/BusinessCd | 0 | 611600 |
| IRS990/ProgramServiceRevenueGrp/Desc | 0 | TUITION AND FEES |
| IRS990/ProgramServiceRevenueGrp/ExclusionAmt | 0 | 0 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 0 | 5161208 |
| IRS990/ProgramServiceRevenueGrp/UnrelatedBusinessRevenueAmt | 0 | 0 |
| IRS990/ProhibitedTaxShelterTransInd | 0 | false |
| IRS990/PYContributionsGrantsAmt | 0 | 2958483 |
| IRS990/PYExcessBenefitTransInd | 0 | false |
| IRS990/PYInvestmentIncomeAmt | 0 | 63743 |
| IRS990/PYOtherExpensesAmt | 0 | 2886622 |
| IRS990/PYOtherRevenueAmt | 0 | 410801 |
| IRS990/PYProgramServiceRevenueAmt | 0 | 4888468 |
| IRS990/PYRevenuesLessExpensesAmt | 0 | 1409784 |
| IRS990/PYSalariesCompEmpBnftPaidAmt | 0 | 4025089 |
| IRS990/PYTotalExpensesAmt | 0 | 6911711 |
| IRS990/PYTotalRevenueAmt | 0 | 8321495 |
| IRS990/QuidProQuoContributionsInd | 0 | true |
| IRS990/QuidProQuoContriDisclInd | 0 | true |
| IRS990/RcvFndsToPayPrsnlBnftCntrctInd | 0 | false |
| IRS990/ReconcilationRevenueExpnssAmt | 0 | -476785 |
| IRS990/RegularMonitoringEnfrcInd | 0 | true |
| IRS990/RelatedEntityInd | 0 | false |
| IRS990/RelatedOrganizationCtrlEntInd | 0 | false |
| IRS990/ReportInvestmentsOtherSecInd | 0 | false |
| IRS990/ReportLandBuildingEquipmentInd | 0 | true |
| IRS990/ReportOtherAssetsInd | 0 | false |
| IRS990/ReportOtherLiabilitiesInd | 0 | false |
| IRS990/ReportProgramRelatedInvstInd | 0 | false |
| IRS990/RevenueAmt | 0 | 5161208 |
| IRS990/SavingsAndTempCashInvstGrp/BOYAmt | 0 | 15351 |
| IRS990/SavingsAndTempCashInvstGrp/EOYAmt | 0 | 15841 |
| IRS990ScheduleA/InvestmentIncomeCYPct | 0 | 0 |
| IRS990ScheduleA/OtherSupportSumAmt | 0 | 0 |
| IRS990ScheduleA/PublicSupportCY170Pct | 0 | 0 |
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