The Royle Family actress, who makes her Corrie debut next Wednesday, revealed that Gloria's reasons for relocating to Weatherfield are "murky to say the least".
"She comes from Spain where she's been running a bar," the star explained. "Aside from the fact that they involve a man called Cliff and something a bit dodgy to do with his business, it's clear she's playing her cards very close to her chest when Stella quizzes her about her sudden appearance.
"Although she's thrilled to see Stella and Eva and to meet Leanne, it's not long before she's showing her true colours. Stella never does anything right as far as Gloria is concerned, and she thinks running a grimy pub in a Manchester suburb represents her hitting rock bottom.
"She thinks the Rover's is beneath her, and therefore so is anyone who drinks there. That doesn't mean when she's given the chance to rule the roost she doesn't lap it up of course. When Stella goes away she leaves Gloria in charge and she decides she's going to save the Rovers by putting it on the map at any cost."
One report last week suggested that Gloria is to transform the Rover's Return into a bed-and-breakfast while daughter Stella (Michelle Collins) is away on holiday.