With commit a4df575, we can get a minimal gnome-shell on GuixSD. Make sure you have elogind and upower-daemon services running, and add the following packages:
adwaita-icon-theme, gnome-session, gnome-shell, gnome-control-center, gnome-settings-daemon, dbus to the packages field (to use with the silm login manager) or user profile (then add 'exec gnome-session' to ~/.xsession). Please give suggestions :-)
