Congratulations to GitLab and KDE, I think it will work out well for both. GNOME and Freedesktop are both already on their own instances and it’s been pretty good.
We actually have a panel with representatives from Freedesktop, GNOME, and KDE at GitLab Commit in London (https://about.gitlab.com/events/commit/#schedule)in a few weeks discussing their experience with GitLab.