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Property, Plant and Equipment and Construction in Progress (Details) - Schedule of assets used as security - USD ($) | Dec. 31, 2022 | Dec. 31, 2021
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Schedule of assets used as security [Abstract] |  |
Buildings, net | $ 9,599,313 | $ 11,314,916
Machinery, net |  | 2,201,707
Total | $ 9,599,313 | $ 13,516,623

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- References No definition available. + Details
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Namespace Prefix: | gtec_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- References No definition available. + Details
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Namespace Prefix: | gtec_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- References No definition available. + Details
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Balance Type: | na
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Namespace Prefix: | gtec_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant