You may have noticed that GNOME 3.12.2 is now part of Funtoo Linux, and does *not* require systemd.
Many thanks to Dantrell B. for spearheading the effort to make this happen!
With GNOME 3.12 integrated into our tree, we were able to unfork a lot of ebuilds and align more closely with Gentoo.
For information on how to install GNOME 3.12, see GNOME First Steps on the wiki. The approach is the same as before -- using the gnome mix-in.
If you have GNOME 3.6 installed, your GNOME mix-in has been auto-updated to be a GNOME 3.12 mix-in and you should be able to upgrade. Find instructions at the link above.