Price per share or per unit of warrants or rights outstanding.

No definition available.

Name:	glta_ClassOfWarrantOrRightPriceOfWarrantsOrRights
Namespace Prefix:	glta_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Threshold Period For Not To Transfer Assign Or Sell Any Warrants After Completion Of Initial Business Combination

+ References

No definition available.

+ Details

Name:	glta_ThresholdPeriodForNotToTransferAssignOrSellAnyWarrantsAfterCompletionOfInitialBusinessCombination
Namespace Prefix:	glta_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Exercise price per share or per unit of warrants or rights outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI https://asc.fasb.org/extlink&oid=126973232&loc=d3e21475-112644

+ Details

Name:	us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of securities into which each warrant or right may be converted. For example, but not limited to, each warrant may be converted into two shares.

+ References

No definition available.

+ Details

Name:	us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

+ References

+ Details

Name:	us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

The cash inflow from issuance of rights to purchase common shares at predetermined price (usually issued together with corporate debt).

+ 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

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

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_SubsidiarySaleOfStockLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_ClassOfWarrantOrRightAxis=glta_PrivatePlacementWarrantsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsidiarySaleOfStockAxis=us-gaap_OverAllotmentOptionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsidiarySaleOfStockAxis=us-gaap_PrivatePlacementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

PRIVATE PLACEMENT (Details) - USD ($)	7 Months Ended	9 Months Ended	10 Months Ended
PRIVATE PLACEMENT (Details) - USD ($)	Sep. 30, 2021	Sep. 30, 2022	Dec. 31, 2021	Jul. 15, 2021	Jul. 09, 2021
Subsidiary, Sale of Stock [Line Items]
Aggregate purchase price	$ 7,250,000		$ 7,250,000
Private Placement Warrants
Subsidiary, Sale of Stock [Line Items]
Number of warrants issued			7,250,000
Over-allotment option \| Private Placement Warrants
Subsidiary, Sale of Stock [Line Items]
Number of warrants issued			750,000	750,000
Price of warrants			$ 1.00	$ 1.00
Private Placement \| Private Placement Warrants
Subsidiary, Sale of Stock [Line Items]
Number of warrants issued			6,500,000		6,500,000
Price of warrants			$ 1.00		$ 1.00
Aggregate purchase price			$ 7,250,000
Number of shares per warrant			1		1
Exercise price of warrant			$ 11.50		$ 11.50
Threshold period for not to transfer assign or sell any warrants after completion of initial business combination		30 days	30 days