Sorry, no. The strong force falls off by 1/r^4, while gravitation falls off by 1/r^2. And the mass of the nucleus simply is not large enough to hold all those positive charges together.

Its been demonstrated beyond doubt a strong nuclear force exists and is available for useful and destructive applications. However, the science has manufactured an atomic nucleus which don’t demonstrate the need for such an excessively strong force and don’t explain the mechanics for the source of that strong force. So, some reverse engineering is due. Suppose that the nature as an operator has abundance of micro mass particles to work with, and the gravity is the only tool available that can be used to create activity, and the operator knows nothing about and has no access to the strong force, gluons, binding energy and electromagnetism. How would the operator use that mass and gravity to create an atomic nucleus that possess the source for the strong force?
“The nucleus consist 99.7% of atomic mass”, but what is the mass and the strong force? I am proposing that the mass particles represents a grainy like substance, only so small that zillion particles may be needed to makeup the total mass of the nucleus. If the proton, neutron and related quarks has to be included, it makes no difference, because, the nucleus is still composed 99.7% of mass. So, how do you calculate the force of gravity within the nucleus where zillion mass particles by their force of gravity are bundled tightly together. To split this bundle of mass particles into its component parts, may equal the energy of the available nuclear force. It also explains the source for so called strong force.

JK