The comment I was responding to was talking about gitlab having SSL on their <us...

nothrabannosir on Dec 9, 2016 | parent | context | favorite | on: Chrome 56 Beta: “Not Secure” Warning, Web Bluetoot...

The comment I was responding to was talking about gitlab having SSL on their <username>.gitlab.io pages. While correct, that is besides the point OP was making. Which was about custom domains. Gitlab doesn't offer that, either.