As far as I can tell, Spirit has no matter thus no gravity. While no one can exhaustively "define God," the common, enduring insight of Israel, classical philosophy, and Christianity is that God cannot be internally inconsistent with himself, and that he does not lie. The order of the natural world and the moral world of men absolutely depends on these insights being true. Moreoever, this understanding is foundational in the Western and specifically American cultural tradition. Indeed, the American idea of "rule of law, not rule by men" is premised in this understanding.
You have just put a limit on God
On the subject of gravity, it should also be noted some have theorized that gravity is so small by comparison to the other major forces because it is inter-dimensional. The root may not be a multi-verse (e.g. foam theories) but rather, another dimension.
Such a situation, they realized to their surprise, could provide a natural explanation for the hierarchy problem without invoking supersymmetry. Suppose, they said, that gravity is actually inherently as strong as the other forces, but because of the warping gravity is much much stronger on one of the branes than on the other one, where we happen to live. So we experience gravity as extremely weak.
"You can be only a modest distance away from the gravity brane," Dr. Randall said, "and gravity will be incredibly weak." A result was a natural explanation for why atomic forces outgun gravity by 10 million billion to 1. Could this miracle be true? Crazy as it sounded, they soon discovered an even more bizarre possibility. The fifth dimension could actually be infinite and we would not have noticed it.
Of course scifi authors and those who hope for warp speed space travel love such theories but we ought to consider Bondi along with Randall and current measurements of dark energy at about 74% of the total mass of the universe.
One more step. Consider that the fifth dimension might be an expanded time-like dimension (P.S. Wesson) and all of the particles in the observable four dimensional universe would actually be massless, multiply imaged from as little as a single particle in the fifth time-like dimension.
And that of course brings us right back to Max Tegmark's Level IV Parellel Universe model wherein the four dimensional physical perceptible universe is a manifestation of mathematical structures which actually do exist outside of space and time.
Obviously to many of us Christians, that brings it all back to the unreasonable effectiveness of mathematics, the rational structure of physical reality, Logos, the Word of God, its Creator, Jesus Christ, Who is God.
Scientific theories cannot obviate God. Multi-verse (or any other scientific theory) is not an either/or to God.
To God be the glory!