Have a look at http://grimoirelab.github.io, which supports many of the data sources for those projects (but still, you need work to retrieve everything, and analyze, and stuff...)

Yes, this was a big job -- one of the reasons I stopped working on something similar 1.5 years ago was that I wasn't capturing the non-GitHub activity. Of course that back then I also wasn't controlling for bots.

I'm hoping the incremental work to maintain this won't be too much trouble and we can release a new version every quarter or so.

Thanks for going out of your way to add support for GitLab!