Yes. We will have to directly look at GR to verify. But as I said before, it might be easier to do the investigation first with EM and then compare to GR rather

Yes. We will have to directly look at GR to verify. But as I said before, it might be easier to do the investigation first with EM and then compare to GR rather than look at GR directly. We don't know what quantum gravity says. The job of the theorist to form self-consistent theories and find the strongest predictions of these theories. When we get experimental data we will find out which theories are falsified.