I just happened to be thinking about this on-line gaming service today, and I was wondering if anyone else here had used it or had any information about it. Surely I can't be the only one who played around with this system way back when? (I can't believe it's almost 20 years ago now. )

The only information I've found so far is this old Antic article:
http://www.atarimagazines.com/v4n6/GamesComputers.html

If you have any stories, information, etc. about GCP (or whatever happened to them), I'd be interested in hearing them.

Edit: I found some more information:

http://www.textfiles.com/magazines/ZNET/0027.txt
http://www.textfiles.com/magazines/ZNET/0037.txt