I'm always suspicious of the GFS spuriously throwing out Atlantic based lows , signally wind rain and mild , when the NAO would suggest otherwise. Neutral possibly slightly negative doesn't tie in with those areas of low pressure.
I know some people have knocked it this year, suggesting that it can't be used on its own, but in hindsight it's been a very good predictor / indicator of whether the Atlantic is a big influencer or not of our weather this winter, especially for us in the North.
My suggestion is take the models with a huge pinch of salt post 150 hrs ,
I think the NLy blocking has this.