GPL Related Links
TLeague - This is the league that I race in, If you are into GPL and want to join a league you will be welcome here.
Race Sim Central - One of the largest sim racing forums covers most racing sims and is home to a large proportion of the GPL community.
Stuart Boyles GPL link site. Probably the best collection of GPL links you'll find.
Stefan Mangnusson's site contains links to the wealth of GPL tracks and the updates for them. This was the site that made me aware of the size of the GPL Community.
Magnus Thorne's track database has been the place to go for tracks for many years