<?xml version="1.0" encoding="utf-8"?>
<xbrl
  xmlns="http://www.xbrl.org/2003/instance"
  xmlns:GTAC="http://gtac.io/20240419"
  xmlns:dei="http://xbrl.sec.gov/dei/2023"
  xmlns:iso4217="http://www.xbrl.org/2003/iso4217"
  xmlns:link="http://www.xbrl.org/2003/linkbase"
  xmlns:us-gaap="http://fasb.org/us-gaap/2023"
  xmlns:xbrldi="http://xbrl.org/2006/xbrldi"
  xmlns:xlink="http://www.w3.org/1999/xlink">
    <link:schemaRef xlink:href="gtac-20240419.xsd" xlink:type="simple"/>
    <context id="AsOf2024-04-19">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001848821</identifier>
        </entity>
        <period>
            <startDate>2024-04-19</startDate>
            <endDate>2024-04-19</endDate>
        </period>
    </context>
    <context id="From2024-04-192024-04-19_custom_UnitsEachConsistingOfOneClassOrdinaryShare0.0001ParValueAndOnehalfOfOneRedeemableWarrantMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001848821</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">GTAC:UnitsEachConsistingOfOneClassOrdinaryShare0.0001ParValueAndOnehalfOfOneRedeemableWarrantMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2024-04-19</startDate>
            <endDate>2024-04-19</endDate>
        </period>
    </context>
    <context id="From2024-04-192024-04-19_custom_ClassOrdinaryShares0.0001ParValueMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001848821</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">GTAC:ClassOrdinaryShares0.0001ParValueMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2024-04-19</startDate>
            <endDate>2024-04-19</endDate>
        </period>
    </context>
    <context id="From2024-04-192024-04-19_custom_RedeemableWarrantsEachWholeWarrantExercisableForOneClassOrdinaryShareAtExercisePriceOf11.50Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001848821</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">GTAC:RedeemableWarrantsEachWholeWarrantExercisableForOneClassOrdinaryShareAtExercisePriceOf11.50Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2024-04-19</startDate>
            <endDate>2024-04-19</endDate>
        </period>
    </context>
    <unit id="USD">
        <measure>iso4217:USD</measure>
    </unit>
    <unit id="Shares">
        <measure>shares</measure>
    </unit>
    <unit id="USDPShares">
        <divide>
            <unitNumerator>
                <measure>iso4217:USD</measure>
            </unitNumerator>
            <unitDenominator>
                <measure>shares</measure>
            </unitDenominator>
        </divide>
    </unit>
    <dei:AmendmentFlag contextRef="AsOf2024-04-19" id="ixv-626">false</dei:AmendmentFlag>
    <dei:EntityCentralIndexKey contextRef="AsOf2024-04-19" id="ixv-627">0001848821</dei:EntityCentralIndexKey>
    <dei:DocumentType contextRef="AsOf2024-04-19" id="ixv-671">8-K</dei:DocumentType>
    <dei:DocumentPeriodEndDate contextRef="AsOf2024-04-19" id="ixv-672">2024-04-19</dei:DocumentPeriodEndDate>
    <dei:EntityRegistrantName contextRef="AsOf2024-04-19" id="ixv-673">Global Technology Acquisition Corp. I</dei:EntityRegistrantName>
    <dei:EntityIncorporationStateCountryCode contextRef="AsOf2024-04-19" id="ixv-674">E9</dei:EntityIncorporationStateCountryCode>
    <dei:EntityFileNumber contextRef="AsOf2024-04-19" id="ixv-675">001-40948</dei:EntityFileNumber>
    <dei:EntityTaxIdentificationNumber contextRef="AsOf2024-04-19" id="ixv-676">66-0969672</dei:EntityTaxIdentificationNumber>
    <dei:EntityAddressAddressLine1 contextRef="AsOf2024-04-19" id="ixv-677">CO Services Cayman Limited</dei:EntityAddressAddressLine1>
    <dei:EntityAddressAddressLine2 contextRef="AsOf2024-04-19" id="ixv-678">P.O. Box 10008</dei:EntityAddressAddressLine2>
    <dei:EntityAddressAddressLine3 contextRef="AsOf2024-04-19" id="ixv-679">Willow House</dei:EntityAddressAddressLine3>
    <dei:EntityAddressCityOrTown contextRef="AsOf2024-04-19" id="ixv-680">Grand Cayman</dei:EntityAddressCityOrTown>
    <dei:EntityAddressCountry contextRef="AsOf2024-04-19" id="ixv-681">KY</dei:EntityAddressCountry>
    <dei:EntityAddressPostalZipCode contextRef="AsOf2024-04-19" id="ixv-682">KY1-1001</dei:EntityAddressPostalZipCode>
    <dei:CityAreaCode contextRef="AsOf2024-04-19" id="ixv-683">(917)</dei:CityAreaCode>
    <dei:LocalPhoneNumber contextRef="AsOf2024-04-19" id="ixv-684">338-7786</dei:LocalPhoneNumber>
    <dei:WrittenCommunications contextRef="AsOf2024-04-19" id="ixv-685">false</dei:WrittenCommunications>
    <dei:SolicitingMaterial contextRef="AsOf2024-04-19" id="ixv-686">false</dei:SolicitingMaterial>
    <dei:PreCommencementTenderOffer contextRef="AsOf2024-04-19" id="ixv-687">false</dei:PreCommencementTenderOffer>
    <dei:PreCommencementIssuerTenderOffer contextRef="AsOf2024-04-19" id="ixv-688">false</dei:PreCommencementIssuerTenderOffer>
    <dei:Security12bTitle
      contextRef="From2024-04-192024-04-19_custom_UnitsEachConsistingOfOneClassOrdinaryShare0.0001ParValueAndOnehalfOfOneRedeemableWarrantMember"
      id="ixv-689">Units,     each consisting of one Class A Ordinary Share, $0.0001 par value, and one-half of one redeemable warrant</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="From2024-04-192024-04-19_custom_UnitsEachConsistingOfOneClassOrdinaryShare0.0001ParValueAndOnehalfOfOneRedeemableWarrantMember"
      id="ixv-690">GTACU</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="From2024-04-192024-04-19_custom_UnitsEachConsistingOfOneClassOrdinaryShare0.0001ParValueAndOnehalfOfOneRedeemableWarrantMember"
      id="ixv-691">NASDAQ</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="From2024-04-192024-04-19_custom_ClassOrdinaryShares0.0001ParValueMember"
      id="ixv-692">Class     A Ordinary Shares, $0.0001 par value</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="From2024-04-192024-04-19_custom_ClassOrdinaryShares0.0001ParValueMember"
      id="ixv-693">GTAC</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="From2024-04-192024-04-19_custom_ClassOrdinaryShares0.0001ParValueMember"
      id="ixv-694">NASDAQ</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="From2024-04-192024-04-19_custom_RedeemableWarrantsEachWholeWarrantExercisableForOneClassOrdinaryShareAtExercisePriceOf11.50Member"
      id="ixv-695">Redeemable     warrants, each whole warrant exercisable for one Class A Ordinary Share at an exercise price of $11.50</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="From2024-04-192024-04-19_custom_RedeemableWarrantsEachWholeWarrantExercisableForOneClassOrdinaryShareAtExercisePriceOf11.50Member"
      id="ixv-696">GTACW</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="From2024-04-192024-04-19_custom_RedeemableWarrantsEachWholeWarrantExercisableForOneClassOrdinaryShareAtExercisePriceOf11.50Member"
      id="ixv-697">NASDAQ</dei:SecurityExchangeName>
    <dei:EntityEmergingGrowthCompany contextRef="AsOf2024-04-19" id="ixv-698">true</dei:EntityEmergingGrowthCompany>
    <dei:EntityExTransitionPeriod contextRef="AsOf2024-04-19" id="ixv-699">false</dei:EntityExTransitionPeriod>
</xbrl>
