3 points
Considering that Hurd is still not finished what other kernel does GNU use other than Linux?
2 points
HURD is the default GNU kernel. From what I here there are also GNU systems running on BSD’d stuff, and I suspect they’re are many GNU systems running with Kernels users have created themes, whether for very specific use cases or just for fun. I recall following someone’s blog an Diaspora* about the latter a year ago until she got bored with it.
