I would definetely rate this in VERY VIOLATE/GORE. There are many scenes where there are gun shots, blood splatters - however, there really isn't a very close up scene of any of these filmed items. So if you are looking for a lot of REAL GORE, this is not the movie, but there are several times where one gang shoots another gang's member and they show the body on the ground with blood - but there's never a scene say with a view of the guys face, or a "shot off head" or anything gorey in that aspect.
There is a TON of violence. Every scene includes a gun, talks about a gun, talks about a gang and how essential it is. I would rate this category an NC-17 movie just due to the amount of guns, talk, shots, and general gang related violence.