| Cover | Mar. 14, 2022 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Mar. 14, 2022 |
| Entity Registrant Name | GITLAB INC. |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-40895 |
| Entity Tax Identification Number | 47-1861035 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Class A Common Stock, par value $0.0000025 per share |
| Trading Symbol | GTLB |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
| Entity Central Index Key | 0001653482 |
| Amendment Flag | false |
