  We briefly review and expand our recent analysis for all three invariant
A,B,D gravitational form factors of the nucleon in holographic QCD. They
compare well to the gluonic gravitational form factors recently measured using
lattice QCD simulations. The holographic A-term is fixed by the tensor
$T=2^{++}$ (graviton) Regge trajectory, and the D-term by the difference
between the tensor $T=2^{++}$ (graviton) and scalar $S=0^{++}$ (dilaton) Regge
trajectories. The B-term is null in the absence of a tensor coupling to a Dirac
fermion in bulk. A first measurement of the tensor form factor A-term is
already accessible using the current GlueX data, and therefore the tensor
gluonic mass radius, pressure and shear inside the proton, thanks to
holography. The holographic A-term and D-term can be expressed exactly in terms
of harmonic numbers. The tensor mass radius from the holographic threshold is
found to be $\langle r^2_{GT}\rangle \approx (0.57-0.60\,{\rm fm})^2$, in
agreement with $\langle r^2_{GT}\rangle \approx (0.62\,{\rm fm})^2$ as
extracted from the overall numerical lattice data, and empirical GlueX data.
The scalar mass radius is found to be slightly larger $\langle r^2_{GS}\rangle
\approx (0.7\,{\rm fm})^2$.
