(gnome gnome-ui) wraps some pieces of the libgnomeui library
for Guile. It is a part of Guile-GNOME.
Libgnomeui historically was a staging ground for code meant to go into GTK. In the modern environment, it has largely been replaced, its functionality having been pushed into GTK+ itself.
However, as of 2008 it still has some utility as a kind of glue layer between lower-level modules, with the authentication manager, the GNOME-VFS GDK-Pixbuf integration, and the session manager code.
See the documentation for (gnome gobject) for more information
on Guile-GNOME.