Alien826
No religious beliefs
Not really.
What about ideas?
Is our awareness physical? If not, where is our awareness seated?
Quantum particles communicate instantaneously. Is there a physical or material link?
It depends upon whether one is a monist or a dualist. Are thoughts physical? Space is nonphysical, yet exists! Many agree on four dimensions, but there are theories of more dimensions.
God could exist in a dimension we cannot comprehend yet.
God is spirit. Most Christians entertain the idea that our spirits are non-physical entities that survive death.
Monists believe only in the natural and what can be explained naturally with no supernatural or nonphysical.
Hmmm, where to start?
Lots of things are described as "existing" and that existence has a different definition in each case. I'll take an "idea" as an example. Do you believe an idea can exist without something physical (in this case a brain) to support it? So an is idea is something non-physical certainly, but doesn't exist in the same sense that a brain exists. How about a pattern? It is a feature of, say a painting, that only exists when a brain perceives it as such. I could go on.
More importantly though, an idea has no power in itself. If you see God that way, then it would be not only non-physical, but totally unable to actually "do" anything, which is not the case for what you define as God.
You say God is spirit, but don't seem to have any idea of what "spirit" is, except to say it is non-physical. You go on to say that "most" Christians believe something is true. With respect, this is not subject to a vote. "Spirit" either exists or it doesn't, and if it exists it has certain properties, and if that's so it is open to scientific investigation.
Incidentally, I'm open to the idea that God could exist in another dimension (or set of dimensions). If so, then it would be physical, as these other dimensions also would be physical. Incidentally, to be able to check that, we need some way to examine this other world. There has to be some way, otherwise God could not influence this world. In any case, there's no need to suppose some kind of non-physical entity. And obviously, without such a method, all you have is a conjecture.