I have a good friend who is a devout Buddhist who is also in AA. AA is about a "Higher Power," not a specific "brand" of Higher Power. No deity is required at all.
I was very "iffy" about my beliefs when I started with AA, but I had no problem with the Lord's Prayer at the end. There is something powerful about standing with others and expressing gratitude, hope, and a desire to forgive, to whatever Power there may be. Even if it is just to the Power that is in that room, in the people I am with.