Gnolls are demonicaly influenced Hyenas. They do not follower a god but are connected to a Demon Lord. Meaning, the only way I could see that working if you somehow mind controll the leader and that leader steers the rest in a beneficial direction.
Pretty sure you can not incorporate chaotic evil demonic animals into any sort of cult or religion.
That's what I meant by god, demon or not I figure it's kind of like a god to them.
