We already have one for Goyhub: https://codeberg.org/gothub/gothub
But one for Gitlab would be nice, yes.
But it doesn't help when a lot of people are still coping with "well at least it's not Goyhub", Gitlab being run by troons basically, and the fact that some of the condoms require JS as well (for example RedditSharp for REEEddit, but that one is hosted on Firebase, which effectively nullifies the whole point of protecting privacy anyway, or Piped for JewTube).

I'm in the process of trying to figure out how other people make it, because it seems like they aren't using APIs, and Pixiv requires an account in order to browse, which makes it even harder to make a condom for.