Buster Fast Track Staging
Gitlab 13.12.3 is available from this repo.
If you'd like to test gitlab packages before they are uploaded to buster-fasttrack, you can add the following lines to /etc/apt/sources.list.
This repo may have newer incompatible versions of dependencies when a new gitlab version is being prepared, so use this repo only when you want to install gitlab from this repo.
deb https://people.debian.org/~praveen/fasttrack-staging buster-backports main contrib deb https://people.debian.org/~praveen/fasttrack-staging buster-fasttrack main contrib
and install gitlab
# apt install gitlab-apt-pin-preferences # apt install gitlab