Yea I run Gentoo on nearly everything else. I have an ancient Gentoo install I just keep copying between machines, as well as a newer/fresh install on one of my servers.
I wanted to do more with Void, but the packaging tool I wrote doesn't work that well with the way Void does updates and I haven't put the effort in to work on it in a while.
I'll probably change out the router and other Void boxes to Gentoo eventually.