because of high blood sugar, my doctor does not allow me any beer or alcoholic beverage. But that's beside the point, what I'm trying to say is that gravity can be the vector difference of electric force and magnetic force.
or
It is a fact that gravity is a very weak force and is negligible in all accelerator experiments (at relatively low energy compared to Planck energy) where the EM force, nuclear strong and weak forces dominate. But theorist believe that at extremely high temperature such as the big bang singularity, or inside black holes, or stellar and galactic centers, all these forces have the same strength.