The unbeaten Irishman defeated the Spanish-born Devon man 58-56 on Frank Warren’s City of Champions card in Leicester.
Stepping up to six rounds for the first time, Blaney, who is trained by Ricky Hatton, was forced to dig deep against a foe who never took a backwards step.
“We knew exactly what he was going to bring and we prepared for it,” Blaney, now 6-0 (3 KOs), said.
“He just came forwards and he was always in my face. It was a good learning experience, probably my toughest to date, and I loved every minute of it.
“Ricky told me afterwards that I hurt Hoskin Gomez a few times, but he disguised it well and I didn’t really notice it.
“In the last round he spat out his gumshield so I think I was getting to him. Looking back, I think that maybe if I’d have had a round or two more I might have gotten him out of there.
“It was my first six rounder and I think it went well. The last three rounds were probably my best so I think I’ll get better and show even more when I get into longer fights.”
Blaney will return to action in Dublin this June.