Worried parent Alan, 67, reveals that Gemma was under a lot of stress before going into the jungle and that's the reason she struggled.
In an interview with the Sunday Mirror, Alan says: "It was a very difficult thing for us to watch because it's so, so personal.
"She was under a lot of stress before she went out, and I think that culminated in what happened when she got there.
"Her decision to quit didn't come as a shock to me at all. I could see the way Gemma was from the moment I saw her on screen. As a parent I just knew."
Despite promising to be a female version of Bear Grylls in the jungle, Gemma lasted only three days in camp before saying "I'm A Celebrity... Get Me Out Of Here!" to show producers.
As early as Day One, she had been in tears after a panic attack onboard a helicopter.
But naturally, Alan and wife Joan believe that Gemma could have gone on to win the show, and will bounce back.
Although he does not elaborate on the 'stresses' that Gemma was under before entering the jungle.
On touching down back in the UK, Gemma told Good Morning Britain that she'd left because of the "shock" of traumatic injuries she'd received before heading to Australia - but it was unclear what incident she was referring to.
She said: "I decided to leave the jungle because, what a lot of people didn't know is, 24 hours before I went in, something really bad happened to me. I had quite bad injuries, I had injuries to my head and all over my body but I didn't want to let anyone down. It was such a massive opportunity."
Meanwhile, dad Alan adds: "Without wanting to be derogatory to the others, I believe Gemma was the only one who seemed to have any personality. She was the star from day one.
"Even Gemma's exit has enlivened the programme. All the others are fairly bland - she's like a 60,000-volt charge."
The TOWIE star is now recovering at the home of her parents.
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I'm A Celebrity 2014: The full lineup
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