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Consolidated Statements of Cash Flows (Parentheticals) | 12 Months Ended
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Dec. 31, 2025
Statement of Cash Flows [Abstract] |
Percentage of issuance of common stock for interest in SH Xianzhui | 13.3333%

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- Definition Percentage of issuance of common stock for interest. + References No definition available. + Details
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Namespace Prefix: | gdc_
Data Type: | dtr:percentItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration