[lQs]

Its easy, just create in your enum something like pGang and create a command to join it.

pawn Код:

CMD:join(playerid, params[])
{
if(PlayerInfo[playerid][pGang] == 1) return SendClientMessage(playerid, COLOR_GRAD2, "You are in our gang already, fool!");
PlayerInfo[playerid][pGang] = 1;
// create some functions here, like SetPlayerColor n' shit.
SendClientMessage(playerid, COLOR_GRAD2, "You've joined our gang!");
return 1;
}

And then leave.

pawn Код:

CMD:leave(playerid, params[])
{
if(PlayerInfo[playerid][pGang] == 0) return SendClientMessage(playerid, COLOR_GRAD2, "You are not in any gang, fool!");
PlayerInfo[playerid][pGang] = 0;
SendClientMessage(playerid, COLOR_GRAD2, "You are free, go fuck some bitches!");
return 1;
}

Remember about +rep if this help you!