Is GOD Physics, and science is just unraveling his laws of self-expression?

That might be close to Einstein's definition of God. But using "Physics" might be a little too constraining, since there is emergent behavior at the levels of Chemistry and Biology that are difficult to describe using only the tools available in Physics.

No.

Physics is the study of the way our universe works. Physics is a man-defined course of investigation, and as such is not divinity. It is a quest.

The universe, on the other hand, to some religions IS Deity. Deity is all that is, and we are a part of it. In that sense, when we study physics, we study our God. When we study Chemistry or Biology or anything else, we study our God. Pagans are people who believe that God or Goddess is immanent in this fashion.

Christians, on the other hand believe that God CREATED all, but is not the universe itself. God may be PRESENT, but is not the actual "stuff" of the universe. The universe is a creation, and God exists "above" his creatures, beyond as well as within. In this sense, by studying physics, we are studying, as you say, his laws of expression. We are assuming that God created and set things into motion, and we are trying to find out the rules he plays by. But still, God is not Physics. Physics is the rules, God is the creator who made them.

I tend to think not. God is personal, and physics is a category of study of the material world. The laws of physics, like all of the material universe, are a creation, not the Creator.

Einstein would probably agree. He had view of god that was very pantheistic (or panentheistic).

I don't think so, but I have noticed that a large number of well-known theoretical physicists are theists, a number disproportional to other scientific fields like biology or zoology. It is a connnection worth investigating.

God made physics, and we can discover him through studying it and science in general.

So yeah, that's a good way of saying it.

God = all things^2...and then some!

That's pretty good, I'll definitely think about it. My first impulse is to say yes. But, I must not come to a conclusion too soon.