He'll pardon himself in Georgia, too, even though that's totally not a thing, then double-dog-dare Georgia to do something about it.

It obviously has never been put to the test, but all the hypotheticals about the subject I've ever heard about conclude that what would most likely happen is that the verdict would still stand, but any kind of incarceration would be deferred or outright eliminated because the execution of his Presidential duties would take precedent.

He wouldn't be able to pardon himself, but Trump would clearly spin the fact that he avoided punishment as "TOTAL EXONERATION", which is often enough for his ego and to placate his base.