Gaballo turned professional in 2014 and won 18 consecutive fights before challenging and beating Stephon Young for the WBA interim bantamweight title.
[1] On 19 December 2020, Gaballo fought Emmanuel Rodríguez for the vacant WBC interim bantamweight title.
Despite being outclassed, outboxed and outpunched by Rodríguez in a lopsided contest, the judges gave Gaballo a split-decision win, which was seen as a robbery.
[6] Prior to the Michael Bravo victory, Gaballo became the mandatory challenger for Jason Moloney's WBO title, Moloney would first defend his title on a rather controversial victory against Saul Sanchez, a month after that, Gaballo made his second defense of the Oriental belt against veteran and former Interim WBA strawweight champion Paipharob Kokietgym, Gaballo makes a quick work out of his Thai foe as he landed the same shot that Donaire made him taste defeat, left punch to the body, ending the bout in 32 seconds.
[8] In April 7, 2024, Gaballo was set to have a keep-busy fight before taking a world championship bout, awaiting for Moloney vs. Takei winner,[9] Gaballo's opponent, Kenbun Torres is an interesting opponent, having a rather lackluster career from 2003 to 2007, amassing a record of 10–2 before retiring until Torres' return in 2016 amassing a record of 12–3, and retiring again, in 2023 he returned again and his first bout was an upset knockout loss against a journeyman but would compose a record of 13–5 before fighting Gaballo,[10] Torres later vowed to make a life-changing victory,[11] and so Torres did, Torres scored a shocking 3 knockdowns against Gaballo en route to a first round TKO loss for Gaballo.