The UFC star’s relationship with wife Layla has been in the spotlight for months because of misinformation and online trolls.
Rival fighter Sean Strickland has even claimed that Layla, 40, is a “predator” and only with Gerry to stay “famous” on social media.
He also claimed that the couple were living with Layla’s ex-husband, but she debunked his lies.
Garry, 26, and Layla have their own son together Leandro Vegas, one, while she also has a son with ex Richard Cullen.
The fighter has insisted that he does not want to “drive a wedge” between Cullen and his son, which is why they sometimes travel together.
He has also claimed that he hired the nutritionist because they work “phenomenally” together.
He told Shakiel Mahjouri: “The main reason behind my wife’s ex-husband is that he’s an elite performance nutritionist and he’s very f***ing good at what he does, to the point where every single UFC weight cut has been easier every time.
“We’ve worked phenomenally together and I’m very proud of the work we’ve done.
“In that same regard, he’s a professional in one regard, he’s also the father of my wife’s son and I never want to be a wedge between a father and a son.
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“I know we’re going on this adventure to travel the world, ‘hey dude, want to travel the world, be my nutritionist and we can all do this together, you can come and see your son whenever you want’, the two of them are going to Disney World this morning.
“And that’s the energy I have.”
He continued: “I want to be a good human, I want to be a good man and never want to be a wedge between a father and a son.
“I know if someone was to be a wedge between me and my son, I’d be livid, I’d be livid and I’d hate that person.
“I never want that on my conscience.
“So the truth is, my wife does not have a boyfriend, my wife has an ex-husband and they have a past.
“I understand that, I’m aware of that, everyone has a f***ing past in their life, everyone does.
“I don’t want to be a wedge between my wife and her ex-husband and her kid and have them go through battles and arguments if I didn’t want them around.
“No, I’m a bigger man than that, I understand that there’s a child in all of this and he deserves to be prioritised.”
The Irishman is fighting this weekend in UFC 298 as he takes on Geoff Neal in Anaheim, California.
The duo have both got unbeaten records with Garry winning 13 fights, while Neal has won 15.