Gina and the rest of the HMs have been aware of her popularity for quite a while now.
It's part of her act as a rich kid that she doesn't give a toss about winning, so it would be out of character and give the game away if she changed..... and she hasn't.
She made a little slip up last night on LF though when she admitted to Dexter and Callum that she lives in a maisonette (not a 5 bedroom house or the Savoy hotel!) She omitted to mention it was owned by Islington Council, of course! Lol!
But Gina has, by and large, kept up this extraordinary act very well. When she exits the house I think she will get plenty of acting work.