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    <ReturnTs>2026-01-29T22:35:40Z</ReturnTs>
    <TaxPeriodEndDt>2025-12-31</TaxPeriodEndDt>
    <ReturnTypeCd>990EZ</ReturnTypeCd>
    <TaxPeriodBeginDt>2025-01-01</TaxPeriodBeginDt>
    <Filer>
      <EIN>263575126</EIN>
      <BusinessName>
        <BusinessNameLine1Txt>GALLATIN GATEWAY SCHOOL FOUNDATION</BusinessNameLine1Txt>
      </BusinessName>
      <BusinessNameControlTxt>GALL</BusinessNameControlTxt>
      <PhoneNum>4065488159</PhoneNum>
      <USAddress>
        <AddressLine1Txt>PO Box 251</AddressLine1Txt>
        <CityNm>Gallatin Gateway</CityNm>
        <StateAbbreviationCd>MT</StateAbbreviationCd>
        <ZIPCd>59730</ZIPCd>
      </USAddress>
    </Filer>
    <BusinessOfficerGrp>
      <PersonNm>Melissa Melton</PersonNm>
      <PersonTitleTxt>Treasurer</PersonTitleTxt>
      <PhoneNum>4065488159</PhoneNum>
      <SignatureDt>2026-01-29</SignatureDt>
    </BusinessOfficerGrp>
    <TaxYr>2025</TaxYr>
    <BuildTS>2025-03-06 01:10:19Z</BuildTS>
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      <MethodOfAccountingCashInd>X</MethodOfAccountingCashInd>
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      <WebsiteAddressTxt>https://www.gallatingatewayschool.com/About-Us/Support-Organizations/Gallatin-Gateway-School-Foundat</WebsiteAddressTxt>
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      <MembershipDuesAmt>0</MembershipDuesAmt>
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      <TotalRevenueAmt>64826</TotalRevenueAmt>
      <GrantsAndSimilarAmountsPaidAmt>80162</GrantsAndSimilarAmountsPaidAmt>
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      <OccupancyRentUtltsAndMaintAmt>0</OccupancyRentUtltsAndMaintAmt>
      <PrintingPublicationsPostageAmt>226</PrintingPublicationsPostageAmt>
      <TotalExpensesAmt>80388</TotalExpensesAmt>
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      <PrimaryExemptPurposeTxt>Public charity</PrimaryExemptPurposeTxt>
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        <DescriptionProgramSrvcAccomTxt>Educational trip to DC</DescriptionProgramSrvcAccomTxt>
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      <ProgramSrvcAccomplishmentGrp>
        <DescriptionProgramSrvcAccomTxt>Expedition Yellowstone</DescriptionProgramSrvcAccomTxt>
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      <ProgramSrvcAccomplishmentGrp>
        <DescriptionProgramSrvcAccomTxt>Outdoor education grade 3-8</DescriptionProgramSrvcAccomTxt>
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      <TotalProgramServiceExpensesAmt>69879</TotalProgramServiceExpensesAmt>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm referenceDocumentName="CompensationExplanation">Brittany Nickolay</PersonNm>
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        <AverageHrsPerWkDevotedToPosRt>1.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
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      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm referenceDocumentName="CompensationExplanation">Melissa Melton</PersonNm>
        <TitleTxt>Treasurer</TitleTxt>
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      <ActivitiesNotPreviouslyRptInd>false</ActivitiesNotPreviouslyRptInd>
      <ChgMadeToOrgnzngDocNotRptInd>false</ChgMadeToOrgnzngDocNotRptInd>
      <OrganizationHadUBIInd>false</OrganizationHadUBIInd>
      <SubjectToProxyTaxInd referenceDocumentName="IRS990ScheduleC">false</SubjectToProxyTaxInd>
      <OrganizationDissolvedEtcInd referenceDocumentName="IRS990ScheduleN BinaryAttachment">false</OrganizationDissolvedEtcInd>
      <Form1120PolFiledInd>false</Form1120PolFiledInd>
      <MadeLoansToFromOfficersInd>false</MadeLoansToFromOfficersInd>
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        <PersonNm>Melissa Melton</PersonNm>
        <USAddress>
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          <CityNm>Galltin Gateway</CityNm>
          <StateAbbreviationCd>MT</StateAbbreviationCd>
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        <PhoneNum>4065488159</PhoneNum>
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      <ForeignFinancialAccountInd>false</ForeignFinancialAccountInd>
      <ForeignOfficeInd>false</ForeignOfficeInd>
      <DonorAdvisedFndsInd>false</DonorAdvisedFndsInd>
      <OperateHospitalInd>false</OperateHospitalInd>
      <TanningServicesProvidedInd>false</TanningServicesProvidedInd>
      <RelatedOrganizationCtrlEntInd>false</RelatedOrganizationCtrlEntInd>
      <TransactionWithControlEntInd>false</TransactionWithControlEntInd>
      <PoliticalCampaignActyInd referenceDocumentName="IRS990ScheduleC">false</PoliticalCampaignActyInd>
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      <TrnsfrExmptNonChrtblRltdOrgInd>false</TrnsfrExmptNonChrtblRltdOrgInd>
      <RelatedOrgSect527OrgInd>false</RelatedOrgSect527OrgInd>
      <PartVIOfCompOfHghstPdEmplTxt>NONE</PartVIOfCompOfHghstPdEmplTxt>
      <OtherEmployeePaidOver100kCnt>0</OtherEmployeePaidOver100kCnt>
      <PartVIHghstPdCntrctProfSrvcTxt>NONE</PartVIHghstPdCntrctProfSrvcTxt>
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        <RentFcltyCostsTotalEventsAmt>0</RentFcltyCostsTotalEventsAmt>
        <FoodAndBeverageTotalEventsAmt>3868</FoodAndBeverageTotalEventsAmt>
        <EntertainmentTotalEventsAmt>0</EntertainmentTotalEventsAmt>
        <OthDirectExpnssTotalEventsAmt>1865</OthDirectExpnssTotalEventsAmt>
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    <IRS990ScheduleO documentId="ScheduleO" documentName="IRS990ScheduleO">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part I, Line 10</FormAndLineReferenceDesc>
        <ExplanationTxt>8th grade DC/NYC trip, 7th grade Whitewater rafting, 6th grade Yellowstone Expedition, 5th grade Butte trip, Outdoor education 3-8th graders, swim lessons K-2nd grade. Yearbooks for all students, teacher needs, and other various learning activities that meet our mission.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part I, Line 16</FormAndLineReferenceDesc>
        <ExplanationTxt>990 EZ tax filing</ExplanationTxt>
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