The 28-year-old is no stranger to the cameras but with Geordie Shore and Ex On The Beach both filmed and edited, it's perhaps understandable he forgot about the no-swearing on daytime TV rule on Thursday (1 September).
Gaz had been chatting about how to attract women when he remarked: "To be honest I think a lot of lads try to be arrogant and be cocky and whatever. I think it's just be nice and be honest. I think, if you pull a girl, just don't be a kn*b. Just don't kick them out."
Realising his faux pas, he added: "Sorry!"
Eamonn Holmes then apologised to viewers for the language, which came just after Eamonn had to say sorry for another guest dropping the F-bomb in an earlier chat.
Afterwards, Gaz tweeted: "I get sooo nervous with things like that, thank you @itvthismorning for having me.. And sorry it's just slipped out #kn*b (sic)."
And, bless, he'd even tweeted BEFORE the show that he needed to watch what he said! "On the way to @itvthismorning #noswearinggaz."
The official This Morning Twitter joked in response: "It was a pleasure to have you Gaz. Next time, we're definitely using #NoSwearingGaz as the hashtag...just as your reminder!"
Despite his accidental expletive, Gaz received rave reviews from many fans for his chat.