GitLab is used only for code review, issue tracking and project management. Canonical locations for source code are still https://gitweb.torproject.org/ https://git.torproject.org/ and git-rw.torproject.org.
Right now, anonbib exists under freehaven auspices, and is not maintained by Tor.
"Not maintained" being the operative word.
Should we move it to a torproject url and try to pretty it up a bit?