There are unlimited gang wars.
Gang Wars - 1976 is rated/received certificates of: USA:R
all
gang bangers, drug wars, gang wars, mugging, etc.
Gang Wars Oakland - 2009 is rated/received certificates of: Australia:M
100000
98888888888888
Gang Wars Oakland - 2009 was released on: USA: 14 September 2009
Gang Wars - 1976 was released on: USA: 7 September 1976 (Lumberton, North Carolina)
yes
You apply for a gang at the gangs alley by clicking on their name and clicking apply on the bottom of the screen (wickedsweeet0026 from hobo wars).
lols
The Gang Wars app is available for both android and iPhone. It can be downloaded from the Play app store and from iTunes, or direct from the Apple site.