Going forward I'm using "universe" to mean "all of existence," just so we're on the same page.
I don't believe in any creator being, and I personally believe the gods came around later. I subscribe to a cyclical universe concept, wherein a big bang event forms a universe cycle, and entropy ends it. There's then a big crunch event and it all happens again. I'm torn between whether the cycles are infinite, with time itself being a loop and thus there being no "first" or "last" cycle, and a non-sentient force such as chance or fate initiating the first cycle. I lean more towards that first explanation though. In it, time would be something like a donut, with "first" being a kind of irrelevant concept.
Furthermore, since I understand time to be the passing of events, I do not believe that a sentience outside of time can exist, as it's thoughts would be events. If it didn't have active thoughts, it wouldn't be sentient. Any being with sentience must therefore be within time at large. That doesn't necessarily mean all beings must be within linear time (the fourth dimension), though. If time is events, it is certainly multi-dimensional, as there is great evidence within physics of dimensions higher than the fourth dimension of linear time as we experience it. But still, time at large must be present for it's thoughts to occur within. I also do not think a being can exist outside of space. Even if it's made of pure light or energy, that light or energy must exist somewhere, it has to be. Just generally, if something is it must be within existence because, well, existence is all that... exists.
As for the gods, I see them as beings within the universe, bound by its laws, just like us. What separates us is how much we're bound and why and how. They didn't create the universe, they're just products of it like everything else.