This is a solid fight at Bantamweight between WBC world champion Donaire and top 20 contender Gaballo. I personally thought Gaballo lost his last fairly clearly and was lucky to get the decision but he should still be a capable opponent in this fight.
Nonito Donaire is a future hall of famer and at bantamweight still looks to be a significant force even at the age of 39. He has a lot of power and now has the experience to land it consistently especially against the younger opponents hes facing.
Gaballo has some power himself but hasn’t shown himself to be anything special enough to make me pick him against Donaire.
I think Nonito Donaire will win by stoppage in the first half of the fight after catching Gaballo with a huge hook in the 3rd or 4th round.