Logos do show, it is disabled. But the vehicles are still dark and no reflections of PBR are shown.
Then you have another problem which doesn't have anything to do with GSX, which is causing problem to the textures.
Remember a short while agao, when you first were absolutely "sure" GSX didn't work and it was "surely" a GSX problem, because it didn't even start, and, instead, turned out to be it WAS a problem of your settings, because after you finally followed my suggestion of resetting files of the simulator, GSX started to work, clearly proving it wasn't GSX after all ?
This is the same, just you have to find what *other* problem you have in your installation, which is causing this. It's not GSX, just like it wasn't GSX before.
No need to add, nobody has reported black texture yet.