As I can tell many of you have not been on the JB server. But this does not mean that you wont be kicked from the the gang. There was a rule put into the jb server that if you are inactive for a period of time that you will be auto kicked from the gang. So to prevent this you must be actively playing on JB and be donating rep to the gang.

so here it is

There are three tiers of pruning. (if you get pruned i feel bad for you son i got 99 points but a prune aint one).
Removes people who are inactive for 14 days | with less than 50 rep (total points spent + current points).
Removes people who are inactive for 1 month | with less than 400 rep (gang leaders will not be removed).
Removes people who are inactive for 2 months | with less than 10,000 rep.
If you're a gang leader, your leadership will be passed (even if you have more than 10,000 rep)

you can read the full article here:
http://hellsgamers.com/topic/54964-drugs-rep-and-gangs/