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Prepayments and Other Assets, Net (Details) - Schedule of Allowance for Doubtful Accounts - USD ($) $ in Thousands | 6 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2024 | Sep. 30, 2023
Schedule Of Allowance For Doubtful Accounts [Abstract] |  |
Beginning balance |  |
Provision for security deposits |  | 10,378
Write off security deposits |  | (10,378)
Ending balance |  |

X
- Definition Amount of allowance for doubtful accounts receivable provision. + References No definition available. + Details
Name: | gsun_AllowanceForDoubtfulAccountsReceivableProvision
Namespace Prefix: | gsun_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

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- Definition Amount of security deposits writeoff. + References No definition available. + Details
Name: | gsun_WriteOffSecurityDeposits
Namespace Prefix: | gsun_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of allowance for credit loss on accounts receivable, classified as noncurrent. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479344/326-20-45-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-4 + Details
Name: | us-gaap_AllowanceForDoubtfulAccountsReceivableNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant