when the Platform is Cloud, only github is supported.
For gitlab you have to choose on-prem. If you do not see on-prem in the drop down then there is no license in the org. pls contact CSM/Sales rep to get the license.
pls read the user guide:
Hi Krishna ,
Clod GitLab is not supported currently ,As sugegsted by Nitin you can only use on prem Gitlab .
In case you still face any issues ,please provide the logs under <Agent dierctory>/apps/GITXXXXX/logs and Agent core log <Agent dierctory>/apps/agentcore
to verify further .