Dear Mr. Morlock,
This merge request provides the gitlab-pages E-Builds. This E-build was rather straight forward to implement if I remember correctly. There is a 9999 build which pulls down the current master branch from gitlab and there is a 0.5.0 which pulls down a specific tagged version from the master branch. I'm not sure which one is working at this time but I have one of them running upon my own machines. I also setup an init file for this.