Finaly I found it, but still not working. The game recognizes the mod. Even... I can change the description in the mod, the name, everithing related. But seems to ignore the Camera.artdef file inside the mod. I can mess arround wiht all the paramaters inside camera.artdef and still no afect at all.I've been using the Steam Workshop mod "Tactical Camera." It's not as good as Free Camera, but it works in GS, so there is that.
Anybody have a clue?