OK, I hesitate to delve into this too much but I did use it a 5-6 years ago
on Gentoo, but mostly for Gentoo-to-Gentoo connections. It did work but
then Google said they were going to start charging to use it so I stopped.
It was, at least at the time, Google's proprietary protocol and IIRC required
that I use google-chrome in some way which I no longer remember
Today I don't run Gentoo anymore but for Kubuntu-to-Kubuntu and
Kubuntu-to-Raspberry Pi/Stellarmate which is Debian based I
use VNC Viewer which works fine for my needs. If you don't figure
this one out you might try that. The instructions for setting it up were
at RealVNC's web site.
Good luck & HTH,
Mark