Gina made the claim in last night's final task, which saw the housemates each give a speech on why they should win.
Giving her reasons, Gina told the other housemates: "Past and present housemates have said to me that I'm a changed women from the lady that walked in on launch night to the lady that's still here.
"Over the time that I've actually been here I've noticed in myself I am a changed women."
She continued: "I give 100% into everything I do and I'm so happy to be here and I'm happy there are people who have so much respect for me."
Gina suggested she had been bullied during her time in the house, saying: "I've had such a tough experience here, I've been isolated and for a whole week or nearly two. I've been picked on, but overcome everything."
And she told the group - and viewers - "In regards to the £100,000, I would give the whole funds to charity, possibly two difference charities. and this will be an experience I will cherish forever."
Big Brother 2013 will air tonight at 9PM on Channel 5.
Browse pictures of the task below...