The 49-year-old could be heard screaming on the ITV breakfast programme after the primate came a little bit too close to her liking.
She was seen backing away from the animatronic monkey as it came and sat next to her on the Good Morning Britain sofa and appeared to be getting friendly.
However, once the gorilla settled down, Kate could be seen visibly relaxing and even patting its fur and getting quite friendly with him.
“He’s not real but he’s a brilliant version and the closest version we’re going to get to,” Kate told viewers.
“I’ll tell you, he’s better looking than many men!” Kate told her co-host Ben Shephard, who quipped: “This is like your wedding photo!”
The 42-year-old went on to joke with a laugh: “You’re flirting with him!” and said he was going to leave Kate with the gorilla while he carried on presenting the programme.
Viewers were hit with the strange scenes on Good Morning Britain after the show featured an item looking at the rise of mountain gorillas in Uganda after recent statistics revealed that the species was experiencing a baby boom.
Conservationist Tim Henshall was on the ITV series to talk about the positive effects of tourism on the African nation.
Kate Garraway is ambushed by a gorilla on Good Morning Britain
Kate Garraway is scared by the gorilla on Good Morning Britain
I’ll tell you, he’s better looking than many men!
“We’re really seeing a turnaround with mountain gorillas and we’re seeing this baby boom,” he explained to the hosting duo.
Tim added: “Tourism is playing a major part,” before revealing that five new babies had been born among the 13 gorilla families.
The latest scenes come a day after the self-confessed Bridget Jones of Good Morning Britain, Kate, was left red-faced when a wardrobe malfunction from last March was brought up on the programme.
Ben and co-host Susanna Reid mentioned the embarrassing moment Kate flashed her knickers at the nation on live television.
Kate Garraway screams at the gorilla on Good Morning Britain
Good Morning Britain: Kate Garraway's best bits
Thu, August 25, 2016
Kate Garraway's most hilarious moments and mishaps from Good Morning Britain.
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Kate Garraway is mocked for wearing her 'pyjamas' to host Good Morning Britain
Kate Garraway comes face to face with a gorilla on Good Morning Britain
“I think now we’ve mentioned it, we’ll have to bring it up in the programme!” said Susanna, 46.
Ben said that the day that Kate released an autobiography, readers would be able to see everything.
Kate hastily added through laughter: “Not liked by me, any of this!”
Good Morning Britain airs weekdays on ITV at 6am.