Hi,

i wanna install a few mods, but it isnt working.
Can u please tell me which folder i should use?

Greetings

PS: I googled a lot but i didnt find a tutorial for GOG

You need to create a folder called 'Mods' inside your installation folder, like so:

..\The Witcher 3 Wild Hunt\Mods\

Then you can use a mod manager like the Nexus mod manager and it will install the mods for you.