The Gang leader decides who stays in the Gang and whom to kick out. When you create a new Gang, you automatically become its leader.
If the leader leaves the Gang or is inactive for one month, admin rights are transferred to his gang mate who is active and has been in the Gang for longest.
Please note, that we do not return gang leader rights that were lost by mistake or due to inactivity. We think it's unfair for the developers to interfere into the in-game life of our players.