<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.26.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>25</ContextCount>
  <ElementCount>85</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>3</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>3</UnitCount>
  <MyReports>
    <Report instance="gcgj10q_03312026.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>00000001 - Document - Cover</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://charmt.net/role/Cover</Role>
      <ShortName>Cover</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="gcgj10q_03312026.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>00000002 - Statement - CONDENSED BALANCE SHEETS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://charmt.net/role/CondensedBalanceSheets</Role>
      <ShortName>CONDENSED BALANCE SHEETS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="gcgj10q_03312026.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>00000003 - Statement - CONDENSED BALANCE SHEETS (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://charmt.net/role/CondensedBalanceSheetsParenthetical</Role>
      <ShortName>CONDENSED BALANCE SHEETS (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="gcgj10q_03312026.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>00000004 - Statement - CONDENSED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://charmt.net/role/CondensedStatementsOfOperationsAndComprehensiveLoss</Role>
      <ShortName>CONDENSED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="gcgj10q_03312026.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>00000005 - Statement -  Statements of Changes in Stockholders Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://charmt.net/role/StatementsOfChangesInStockholdersEquity</Role>
      <ShortName> Statements of Changes in Stockholders Equity</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="gcgj10q_03312026.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>00000006 - Statement - CONDENSED STATEMENTS OF CASH FLOWS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://charmt.net/role/CondensedStatementsOfCashFlows</Role>
      <ShortName>CONDENSED STATEMENTS OF CASH FLOWS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="gcgj10q_03312026.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>999007 - Disclosure - ORGANIZATION AND BUSINESS BACKGROUND</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://charmt.net/role/OrganizationAndBusinessBackground</Role>
      <ShortName>ORGANIZATION AND BUSINESS BACKGROUND</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="gcgj10q_03312026.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>999008 - Disclosure - GOING CONCERN</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://charmt.net/role/GoingConcern</Role>
      <ShortName>GOING CONCERN</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="gcgj10q_03312026.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>999009 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://charmt.net/role/SummaryOfSignificantAccountingPolicies</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="gcgj10q_03312026.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>999010 - Disclosure - STOCKHOLDERS??? EQUITY</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://charmt.net/role/StockholdersEquity</Role>
      <ShortName>STOCKHOLDERS??? EQUITY</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="gcgj10q_03312026.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>999011 - Disclosure - SUBSEQUENT EVENTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://charmt.net/role/SubsequentEvents</Role>
      <ShortName>SUBSEQUENT EVENTS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="gcgj10q_03312026.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>999012 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://charmt.net/role/SummaryOfSignificantAccountingPoliciesPolicies</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="gcgj10q_03312026.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>999013 - Disclosure - GOING CONCERN (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://charmt.net/role/GoingConcernDetailsNarrative</Role>
      <ShortName>GOING CONCERN (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://charmt.net/role/GoingConcern</ParentRole>
      <Position>13</Position>
    </Report>
    <Report instance="gcgj10q_03312026.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>999014 - Disclosure - STOCKHOLDERS??? EQUITY (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://charmt.net/role/StockholdersEquityDetailsNarrative</Role>
      <ShortName>STOCKHOLDERS??? EQUITY (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://charmt.net/role/StockholdersEquity</ParentRole>
      <Position>14</Position>
    </Report>
    <Report instance="gcgj10q_03312026.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>999015 - Disclosure - SUBSEQUENT EVENTS (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://charmt.net/role/SubsequentEventsDetailsNarrative</Role>
      <ShortName>SUBSEQUENT EVENTS (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://charmt.net/role/SubsequentEvents</ParentRole>
      <Position>15</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File>gcgj-20260331.xsd</File>
    <File>gcgj-20260331_cal.xml</File>
    <File>gcgj-20260331_def.xml</File>
    <File>gcgj-20260331_lab.xml</File>
    <File>gcgj-20260331_pre.xml</File>
    <File doctype="10-Q" isDefinitelyFs="true" isUsgaap="true" original="gcgj10q_03312026.htm">gcgj10q_03312026.htm</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies>
    <BaseTaxonomy items="121">http://fasb.org/us-gaap/2024</BaseTaxonomy>
    <BaseTaxonomy items="26">http://xbrl.sec.gov/dei/2024</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
