Brad Guth wrote:
I believe there's at least 1e100 photons per atom, and we're talking
about all the way from those extremely low frequency gravity photons of
infinite light years to those sub gamma photons of the sub-picometer
status, thus we have lots to pick from.

If the gravitational interaction is mediated by a boson, it will be a
spin two boson. A photon is a spin one boson.

Bob Kolker