So keep GAL. Not caring what she thinks about your GAL is detachment. So work on that and get there. And continue to work on cementing your positive changes (180s).
Your W sounds a lot like mine, which is why i gravitated to your sitch. My W had a fantasy outlook on how great her post-marriage life was going to be. Over time, the reality started to settle in. As she worked on her resume, and the reality of getting a job sunk in, as she realized how much worse off her life would be,not having my income, needing her own income (which would be significant less), that what she drives, where she lives, what she eats, etc were all going to take a big step down in quality, she started questioning if she was making the right decision. I started to hear things like "God hates divorce." "I don't think it is the right thing." Etc. A complete 180. But the war inside her was real. One day she would be talking logistics of splitting up, the next talking long-term plans as if we were staying together. It was like she had two people inside of her.
The one thing I did really well was GAL. That's what you need to do. The more you are gone, the more she can miss you, and the more she can realize that life without you isn't going to be all that great. There is nothing you can do to wake her up from her fantasy. But that doesn't mean that she can't be awakened from it, it just means it isn't in your power to evoke. This is why we say, give her time and space. She may still leave. Or she may not. No one knows. Not even her at this point!
M(53), W(54),D(19) M-23, T-25 Bomb Drop - Dec.23, 2017 Ring and Piecing since March 2018