Every restart or twice a day, all gangs have 10-15 minutes time to spawn at the Ghost Hotel and equip themselves.
Within the 10-15 Minutes, all participating gangs need to preposition aswell. While preperation, nobody can kill eachother.
In the middle of Ghost Hotel, there will be a flag. Goal for every participating gang is to capture the flag either;
a) the longest
b) hold it until end
to keep winning, aswell as eliminating every other rival gang member participating.
I got no idea for the rewarda at the moment, but could be an alternative for a casino cartel for example.