I go to this forum from time to time.
http://www.shorthairs.net/phpBB2/index.php
Here's another site I found awhile ago...haven't looked at it in awhile so not sure how good it is:
http://www.mollyjones.com/pages/gspwebsites.htm
I think they do have a breeders list and/or forum for breeders. Be careful though, as some of the breeders I have GSP's that look to be only show dogs.