Anyone who's ever had occasion to attend a 12-step meeting (polite invitation from the local magistrate, polite eviction notice from local spouse, etc.) will have run face first into "the God thing" there.
It is possible to take advantage of 12-step principles without the God concept or any other mystical belief system. There is an essay on one atheist addict's experience here:
This is a form of writing (noding they call it) which relies in part on the judicious use of links to other nodes in the network. Check some of these links out to get the full experience of this piece. The link from the words "the universe doesn't hear or answer prayers," for example, leads to a wonderful essay on a rogue priest's unique take on the Jesus myth titled "You Are Not Special. You Will Die Here Too." Midrash at its very best there.
Best to all.