Hi Trumpet. I'm so sorry that you find yourself here. You couldn't have found a better place to be in such a lousy time, though.
First thing: Read the book. Divorce Remedy is the newer, updated version of Divorce Busters. Either Will be fine, but reading the book will help you immensely - especially as you start getting advice on the site.
2nd: Study Sandi's 37 Rules as if you are preparing for a quiz. Of those rules, one of the most important for you right now is to believe NOTHING that she says, and only 50% of what she does...and of that, you need only pay attention to positive actions. The things your W is saying sound like standard script. They all seem to say similar things.
You're off to a pretty good start actually. GAL is huge! Takes pressure and focus off scared/hurting spouses and allows you to release that kung-fu grip on W. You want to be pleasant, happy. Calm and strong are two of my favorite words for how to act.
She's still in the house, still willing to give it a go...those are pretty good things to start with.