Considering the "gang" is actually a cell (set) of an organization and not just some copycats (as is common in the United States), I would ask myself questions. Do I need to be here? If the answer is no, jump a couple states over, switch phones and start over. If the answer is yes, well I'd try to rectify the situation in a civil manner. If that failed, then I guess the coroner will be busy. With who? Only God knows. I know it would end up in with me either: in a ditch, a vegetable, or incarcerated for life. Thankfully, I respect human life, so I would never have to worry about shooting and stabbing it out with the local cartel.
It is highly unlikely that you would be threatened by an actual gang member unless you: snitched on one, attacked one, killed one, stole something from one, owed one money, screwed one's main girl (pardon the language) or are pulling customers from that gang's "business".