Can Guix support Zen 2/AMD Ryzen?

[Jesse Gibbons]

Hi guix,
I built a guix image for a hardware enthusiast friend to try on his 
computers, in part to see how well/completely his more modern hardware 
would run guix and if it would be worth commissioning him to build me a 
computer. It successfully booted, but the screens turned blank and 
didn't show gdm. My friend tried this twice, and the same thing 
happened. He tried ctrl+alt+f{1..6} and didn't see anything (though he 
has a weird keyboard that requires him to hold a modifier key to enter 
any function key). He suggested it might be because his computer has a 
Ryzen CPU with the Zen 2 Architecture, which he knows might need to work 
around. Since it booted fine, I think it might be more related to his 
Nvidia GPU. Is there anything I can do, without resorting to proprietary 
solutions, to make a guix image with a desktop at least displays with 
his hardware?
-Jesse