There are three primary development sites for the gpc package. In order
gmc's place in Den Haag (
which will have its graphical (on-the-fly generated) presentation on
the gpc homepage.
Some old and big building aloha calls home, which will be online eventually. Maybe his old homepage is still there on http://www.linux-ice.demon.nl/
The third site is in almelo (
firstname.lastname@example.org), who will
too (since he is the one working on the web-development).