I went back and checked and it seems I kind of remembered it right, when it was first released on GOG there was some kind of version incompatibility with the Steam one: Link
You can see it in the SKSE page too, there’s a version specific for GOG: Link
But reading in the gog forums it seems this is not a problem for Fallout 4: Link
I went back and checked and it seems I kind of remembered it right, when it was first released on GOG there was some kind of version incompatibility with the Steam one: Link
You can see it in the SKSE page too, there’s a version specific for GOG: Link
But reading in the gog forums it seems this is not a problem for Fallout 4: Link
We’ll have to try and see! ✌️