Id be more content with a tiebreaker being related to GAC. Like more offensive wins/defensive wins. Or GAC points overall, which Im personally leaning towards.
So for example, theres a tie in the very first round. Then you look at feats and the points they awarded to your overall ranking for that GAC season. If you have more GAC points you are deemed the winner because you actually played better during that season than your opponent did.
The way it is now is just makes little sense to me since GP only matters for which division you are in and that should be it.