heh. 3vi1...god always was and will be...
I'll estimate you could possibly discuss this. By definition, the universe contains all. God is omnipotent, all powerful. If something was all powerful, that means there can be nothing that is more powerful than it. Thus, if God was part of the universe, he could not be all powerful. If god exists outside of the universe...that can't be because the universe contains all. And my logical conclusion is that God IS the universe.
According to religion, God made everything and controls everything that is happening. Well, everything is everything, that's true. Everything controls what's happening, also true. We call it physics, chemistry, science. God is with in every one of us. We'll, yeah? Are we not a small fraction of the universe?
Existing outside of x,y,z,t...that parts a bit confusing. A two dimensional plane can be 3D, it's just that it's upper dimensions are held constant. Since God is all dimensional (because the universe is everything that there is), God always was and always will be.
I know, crazy idea. It's troubling me too. But it's scary, because it makes so much sense to me due to how it explains everything.