GitLab acquired GitHost from me a couple years ago [1]. They were able to do more with it than I ever could of. It's a very niche product that probably wasn't worth the engineering effort to keep it feature complete, especially at GitLab's pace of adding new features. GitHost was created before CI/CD was integrated into GitLab core. It was a much simpler product to automate deployments for back then.
[1] https://about.gitlab.com/2015/04/26/gitlab-acquires-githost/