I think it's a good idea to add another way to earn Gang Points, since players don't like to be basing all the time. It would be cool if you could win 2 Gang Points per Gang Spar win since Gang Spar is so dead, however this might be a bad idea because players might boost Gang Points. If there are less than 3 players in the gang doing Gang Spar, they won't be able to gain Gang Points, same as if you win with a team with less than 3 players. They should also make competitions for the gangs like, teamwork events. Not TTS, like a new room with a shooting range similar to classic, gang that gets most points will get a prize of Gang Points. This is just an idea I would like to share and tell me things that could go wrong and I will try to answer it.  

I think you might want to check out this thread:

http://www.graalians.com/forums/showthread.php?t=30076