dev-python/gnome-python seems to have a wrong URI in HOMEPAGE, i get a 404 not found. I'd correct it myself, but i have no idea what the correct URI would be, freshmeat also shows http://www.daa.com.au/~james/pygtk/ :(
i've put in pygtk's homepage for now as they are pretty much the same project. there is no independent homepage for gnome-python that i know of.