I'm not offended when someone doesn't believe in God. I can only share my experience......nobody in AA ever tried to shove their God down my throat. It's not a religious program, it's a spiritual program, there is a difference.
Either way, the only thing that matters is finding something that'll work for you, a plan or program for your recovery. Doing it on my own didn't work, I had to find someone or something to reach out to for help and support. I just happened to find AA and a God of my understanding, and it worked.