It appears 4.1+ will support gtk+3 and friends. http://java-gnome.sourceforge.net/README.html Reproducible: Always
java-gnome-4.0.19 has been fixed to depend on gtkspell-2. Please file a separate bug if you want to see java-gnome-4.1.x in portage; use "Java" (not "GNOME") as the component, since java-gnome is maintained by the Gentoo java team.