Many of the online comics that I read every morning decided to take a moment to dedicate one strip to Gary. I think this just shows how important of an influence he was for many imaginations out there.

http://www.somethingpositive.net/sp03042008.shtml

http://www.giantitp.com/comics/oots0536.html

http://www.penny-arcade.com/comic/2008/03/04

http://archive.gamespy.com/comics/dorktower/archive.asp?nextform=viewcomic&id=1347

http://xkcd.com/393/ 

I am sure there are more out there, but these are the ones I tend to frequent.