This is really STAR TREK speculation. "Backwards through time" is a false perspective that's relative to our position in the universe. But God has no position in the universe. He permeates all of it. To say God exists in the past in nonsense. There is no "past." It's a human word to describe a notion, a concept; it's not a "place" to be inhabited.
Time travel is all conjecture. It's pushed by the same atheists who want us to believe in space aliens.
But wormholes are for worms.
Then there is no future either. Eternity then becomes nothing more than a traveling present.
BTW what do you see when you gaze up at a star that emitted its light 10,000 years ago? Are you observing the present, or are you observing the past?