<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.26.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>524</ContextCount>
  <ElementCount>29</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>317</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>3</UnitCount>
  <MyReports>
    <Report instance="c116855_ncsrs-ixbrl.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>030000 - Disclosure - Form N-CSR Cover</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/oef/role/NcsrCover</Role>
      <ShortName>Form N-CSR Cover</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="c116855_ncsrs-ixbrl.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>030001 - Disclosure - Shareholder Report</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/oef/role/ShareholderReport</Role>
      <ShortName>Shareholder Report</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="c116855_ncsrs-ixbrl.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>040020 - Disclosure - Shareholder Report, Holdings (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails</Role>
      <ShortName>Shareholder Report, Holdings (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File doctype="N-CSRS" isDefinitelyNotFs="true" isNcsr="true" isOEF="true" isRRorOEF="true" isUsgaap="true" original="c116855_ncsrs-ixbrl.htm">c116855_ncsrs-ixbrl.htm</File>
    <File>glo-20260430.xsd</File>
  </InputFiles>
  <SupplementalFiles>
    <File>i01ca1b7655db742aa45062dc.jpg</File>
    <File>i18371dc1e942f5ed2a373cfa.jpg</File>
    <File>i19b66a0e63bcbd501be19ad6.jpg</File>
    <File>i1ff9e84321457356cff094dd.jpg</File>
    <File>i36af24beaf01982b2a90535f.jpg</File>
    <File>i3f1aa5c881712ba566d75abd.jpg</File>
    <File>i44f9875d3bb2402024ab5c10.jpg</File>
    <File>i4a19f9e0c500454214c56c7a.jpg</File>
    <File>i737fd6ee5cbf4a75ac36a3bc.jpg</File>
    <File>i7af197fa69cc10a8df09e503.jpg</File>
    <File>i7bb7283149be74e4123cee69.jpg</File>
    <File>i7f825b1405160b27c15dcf6e.jpg</File>
    <File>i87eb69f4ec50ebc2d76de58e.jpg</File>
    <File>i95621a4b72d945220f3e8307.jpg</File>
    <File>i95a126741b65be7c1287f7f0.jpg</File>
    <File>i98dfc47344e5c9a9cd67e4bc.jpg</File>
    <File>ia5dacd8d98f2bed00b3a6999.jpg</File>
    <File>ia989cc422f331afb6c87f8e9.jpg</File>
    <File>ib9fb4350f40d426f0bafec38.jpg</File>
    <File>ibdecb481fd4661bbf39994a0.jpg</File>
    <File>ic4eb8d46a4a084daa34d64bf.jpg</File>
    <File>id052b7d3800ba1eb479f806a.jpg</File>
    <File>id4394f0fd33389654b86838d.jpg</File>
    <File>id8f474ddeb6c3cbd55a1b251.jpg</File>
    <File>ie24a1b3484fa52f38146865c.jpg</File>
    <File>logom4.jpg</File>
    <File>x1_c116855x1x1m4.jpg</File>
  </SupplementalFiles>
  <BaseTaxonomies>
    <BaseTaxonomy items="48">http://fasb.org/us-gaap/2025</BaseTaxonomy>
    <BaseTaxonomy items="78">http://xbrl.sec.gov/dei/2025</BaseTaxonomy>
    <BaseTaxonomy items="867">http://xbrl.sec.gov/oef/2025</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>false</HasPresentationLinkbase>
  <HasCalculationLinkbase>false</HasCalculationLinkbase>
</FilingSummary>
