The GerWin project has changed its name to GNU Ferret: GNU Free Entity Relationship and Reverse Engineering Tool. The rationale behind the name changing is to avoid futurable legal conflicts with the owners of the Erwin(TM) trademark.
So you dont want GerWin anymore... but GNU Ferret. Ferret is an official GNU package, and therefore the new homepage is at http://www.gnu.org/software/ferret . The development pages are at http://savannah.gnu.org/projects/ferret
Sorry for the inconvenience! But, after all, we got a mascot at no cost! ;)