The former TOWIE star says she's seen and done so much in life that she won't bat an eyelid no matter happens in the CBB compound.
"I haven't got any fears. The girl I am today has been through so much, that nothing can shock or surprise me. I can't see anything happening that will weird me out."
Gemma, 34, made her first foray into reality competition shows back in 2014 when she signed up for I'm A Celebrity but memorably only lasted three days in the jungle.
She's vowing this time around to stay until the end. "I'm going in there to win it; I never went into the jungle to win it, never, I'm going into Big Brother to win it, definitely. It's going to be crazy."
As for what sort of housemate she will be, she said: "A very fun housemate, up for the banter! Let's not argue, let's go in and have a great time.. I'm up for meeting new people and let's see what's going to happen. There is going to be drama, there will be arguments, time will tell! Bring it on, I can't wait to get in there!"
CBB airs nightly on Channel 5.