Not really, there is no scientifically accepted fact/theory or anything similar to do with God existing, as such it is safe to say that he does not exist... and since he does not exist, believing in an imaginary being is a delusion
Do I need to quote Pirsig again?
Have you ever heard of Darwin's 'abominable mystery'?
Despite coming up with evolution, Darwin could never understand how the flower evolved. It was just impossible as it made no sense whatsoever what set of intermediates could exist between the angiosperms (flowering plants) and the gymnosperms (non-flowering plants, the most 'advance' of which have cones instead of flowers). Darwin even wrote with dispair that this truly was an 'abominable mystery'. For decades people hypothesised and failed to come up with any logical sollution to the dilemma - there was no evidence to suggest that one was a decendent of the other.
Through the 1990s a very clever team of scientists decided they would see what happened if the knocked out the genes that were being expressed in the flowers of the plant - using technology that was unheard of only 30 years before.
They found out that by knocking out the location of where certain genes were expressed, they could totally change the morphology of the flower. They called this the ABC model:
(bonus picture)
http://dev.biologists.org/content/131/24/6083/F1.large.jpg
Ultimately, they found out by changing the location of where the A, B and C genes were expressed, and in which quantities, they could essentially transform a cone producing plant into one that produced flowers, and a flower producing plant into something that resembled an unconventional cone. In other words, they found evidence to suggest that flowers probably evolved as a result of a series of transcriptional and translational mutations in the A, B and C genes of plants
Now, you might be wandering what this has to do with anything, but there are a few things you should take note of.
1) Science never assumes that something is not true because there is no evidence to support it.
2) A lack of evidence is not evidence to the contrary.
3) Just because we don't have a way of observing something, doesn't mean we might not be able to do so in the future.