No, because we haven't defined gravity as a distinguishing property of God, but we have defined it as one of matter. If you want to describe God as having gravity, fine. I suggest that that would make God part of the materialistic universe, but since God can be anything, including internally inconsistent, I will defer to your judgement.
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.
*suggested* only. Not determined, not a fact.
If you want to grasp at that in a desperate attempt to nullify God, you are certainly entitled.
It certainly gives new meaning to *grasping at straws*.
According to anything I can find no one has the slightest idea of what matter is.. There is a lot if if'n.. but nothing concrete.. "Strings" are a metaphorical image not something actually thingly..