Subsequent Events - Additional Information (Detail) - USD ($)	Oct. 04, 2022	Sep. 30, 2022
Subsequent Event [Line Items]
Deferred underwriting commissions noncurrent		$ 2,800,000
Subsequent Event [Member] \| Over-Allotment Option [Member]
Subsequent Event [Line Items]
Sale of stock, price per share	$ 10
Proceeds from issuance or sale of equity	$ 12,000,000
Offering costs	412,500
Deferred underwriting commissions noncurrent	$ 262,500
Subsequent Event [Member] \| Over-Allotment Option [Member] \| Sponsor [Member]
Subsequent Event [Line Items]
Sale of stock, number of shares issued in transaction	1,200,000
Subsequent Event [Member] \| Private Placement [Member] \| Sponsor [Member]
Subsequent Event [Line Items]
Sale of stock, number of shares issued in transaction	42,000
Proceeds from issuance of private placement	$ 420,000

Deferred underwriting commissions noncurrent.

No definition available.

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Namespace Prefix:	glst_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Other offering costs.

+ References

No definition available.

+ Details

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Namespace Prefix:	glst_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash inflow associated with the amount received from entity's raising of capital via private rather than public placement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3255-108585

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash inflow from the issuance of common stock, preferred stock, treasury stock, stock options, and other types of equity.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The number of shares issued or sold by the subsidiary or equity method investee per stock transaction.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Per share amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

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- Details

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Namespace Prefix:
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- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=glst_SponsorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: