From Chillpoint Wiki

A gang in the server is considered anyone using the /gang commands and member all have the same color blips and are on the /gang info list.

Gang-Related Revenge Kills

If your gang member has the right to revenge kill (they have been raped or robbed), then you may help them if you are near them.

Defending

If your gang member is being attacked, you may defend them if you are near them. This means defense from cops, military, hitmen, etc. You may continue to defend your gang member even after they have been arrested/killed if the attacker is still present.

Gang Turf

Gang turf are scripted zones that can be taken over by gangs. A turf can be taken over by a minimum of 3 members of a registered gang. If the turf already has an owner, the owner gang must have at least 3 members online. You may not kill anyone just for coming into your turf.