GitLab Community Edition docker image based on the Omnibus package. I just created a template for this. It's pretty easy to get up and running, as this docker contains all necessary dependencies already (Redis, PostgreSQL, Nginx etc.).
Application Name: GitLab-CE
Application Site: https://gitlab.com/
Docker Hub: https://hub.docker.com/r/gitlab/gitlab-ce/
unRAID Template: https://github.com/tynor88/docker-templates