  The diffractive photoproduction of $J/\Psi$ on a nucleon, is mostly due to
gluonic exchanges at all $\sqrt{s}$. In holographic QCD (large number of colors
and strong $^\prime$t Hooft coupling), these exchanges are captured by
gravitons near threshold, and their Reggeized Pomeron form asymptotically. We
revisit our holographic analysis of the A and D gravitational form factors in
light of the new lattice data, and use them to refine our predictions for the
photoproduction of $J/\Psi$ near threshold, and the comparison to the GlueX
data. We use these results to estimate the scalar and mass radii of the
nucleon, and describe the gravitational pressure and shear across a nucleon.
