Let's assume a God exists.
So, does God believe in God?
And if he does - in which one?
I think that's not easy to tell - answering seems to require reasoning about objects in the domain of God.
Explaining in which way it can not be answered would make an interesting answer too!
(I do not know whether there is a consesus whether logic can be applied to "God-domain objects".)
Hmm... after seeing some downvotes, I noticed that there may be a problem with the question, restricting who can answer it:
I do not think God exists, but make the assumption it does for the purpose of this exercise in abstract thinking; But now I notice that someone who answers it by thinking partly in this other kind of reasoning would need to actually assume God exists, just to be able to even know that "other kind of reasoning".
Now, tha is unusual, but it looks like the answer would belong to a different Stackexchange site.
One could think about also asking that on https://christianity.stackexchange.com/ - but I think that would be interpreted in a different way, because of the very different context - so that does not really work.