GnoTeX is not ready to work with it. If you want to see the actual stage use cvs like follows:

cvs -d:pserver:anonymous@cvs.sourceforge.net:/cvsroot/gnotex login
cvs -z3 -d:pserver:anonymous@cvs.sourceforge.net:/cvsroot/gnotex co -P gnotex

Hit return for password, there isn't any.

If you use Gentoo you may want to use my ebuild for a systemwide installation.