GF glass is excellent but not great I find. Still, they are fine with 102mp and are totally suitable for demanding applications of course.
The best P1 Schneider lenses are significantly better and so are a majority of Z lenses.
I find the S 85mm f1.8 in particular more appealing than the Fuji 110mm f2.0 for example.
The Fuji 23mm, 32-64mm, 45mm, 120 macro (probably the sharpest, this one is clearly P1 level) and 250mm are my favorite.
I don’t have experience with X1D lenses but various elements lead me to think they are overall better than G glass. G glass has many zooms though that increase significantly flexibility though.
Cheers,
Bernard