I'm definitely not taking the GFS too seriously at the moment. They're way too many models, not in the direction of the GFS. And we're not just talking the low-end models, but also the better models.
As far as a Sunday night Monday deal, I think the GFS is the only one as far east as it is. Everyone else is closer to the coast in the sense of bringing snow up into Southern New England. So we'll see what happens in the next day or two with the GFS
As far as later next week midweek and late week, not even bothering right now. I don't think any models have a grasp on exactly what's going to happen yet. Give it time.