GitLab is configured via a text file on the Gitlab server. This is a write protected file, so you will need to use sudo – or gksudo if you prefer a graphical text editor – to open the file.
sudo nano /etc/gitlab/gitlab.rb
After editing this file, you will need to reconfigure GitLab for your changes to take affect.
sudo gitlab-ctl reconfigure
There are quite a few available options here in the configuration, these are just the ones that worked for me. Feel free to browse and make adjustments as needed.
If you choose to utilize the built in backup functionality of GitLab, you can configure it to back your GitLab install up to Google Cloud Storage among other options. If you choose another method check the GitLab docs for that provider.