It will never happen under Blackburn, but Gail (like many characters) needs to undergo a rebirth. Her current circumstances would be a great opportunity for her to reevaluate her life, her bad choices and completely rethink her future.
I would actually find it believable for Gail to have a slight breakdown and use it as chance to grab her life and drastically alter it.
1. Give Michael the push and really tell him what she thinks of him (I'd actually love a scene where she breaks down hysterically laughing at how she married the pathetic cretin who robbed her house!!, Where she looks in the mirror in wonderment at the woman she's become and vows to pull herself back together).
2. Take a proper job, in Roy's or The Bistro.
3. Living with her family actually works for Gail, so she could use the bit of money she has left to turn the garage into a granny flat, giving her, her own space but still being an integral part of the family.
4. Leave her single, make her into a strong and independent (and I hate to use this word) matriarch, loved and respected by her family. Giving them what for when required and pulling them into line.
If the rumours about Bethany's upcoming story with Callum are true, I dread to think how 'buffoon Gail' is going to deal with it!!