Well, I’m not a constitutional lawyer, but I think all this would prove legally is that he failed to make the ballot in Georgia. Candidates sometimes do so, for one reason or another, but that doesn’t disqualify them from winning if they get enough electoral votes.
You don’t need to be a Constitutional lawyer.
How can a man be president of 50 states, if he is illegal to be president in one?
Or does Georgia get to secede again? Clearly he cannot be president of a state where he is illegal to run.