i don't have an addon from aerosoft yet nor nool installed
That's precisely why they don't work, if you have just the scenery, but not one of these support software, they won't work.
i don't know how to fix that
You fix that, by installing the missing software.
is there anyway to make those VDGS work with GSX ?
No, they work using their own system.
However, there might be GSX profiles which might have been made by placing the GSX VGDS on top of the one that came with the scenery, so you won't need their software anymore, since those would then be GSX proper VGDS, which of course will make the Marshaller go away.