Re:Phabricator – GitHub Alternative written in PHP used by t...
by elygre on Wednesday June 06, 2018 @11:13AM
(#17247776)
GitLab itself is almost exclusively Ruby. Go is used in several newer services (pages, ci, gitaly, more).
See https://gitlab.com/gitlab-org/gitlab-ce/graphs/master/charts for the core server.
Still, that doesn’t help much. Gitea just does a lot less than Gitlab behind the scenes.