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.
The current implementation of SOCKS is not very robust and does not support SOCKS authentication.
For these reasons we should integrate this SOCKS client implementation: https://github.com/hellais/txsocksx.
It's based on the work done by https://github.com/habnabit/txsocksx.