I'm not sure why you misunderstood the OP, but it's not about using go get, but about
godoc.org pulling from godoc. The idea of gitlab running a godoc instance is interesting but I'm pretty sure it would be more work than
godoc.org being able to retrieve gitlab repositories to display.
And... yes they already work!
Only glitch I'm having now is that when I first prompted godoc to pull the repo there was a package in it, that is no longer present. Obviously this is a caching issue? Maybe a bug?
See this: