Hi
Samuel,
I'm building a 911 GT1 register. You can check my insta account : https://www.instagram.com/gt1history/
I stumbled upon your post when you say you have a friend with GT1 VIN WP0ZZZ99ZWS396018.
Could you share the details of the car (exterior color / interior color) and if it has something specific that makes it recognizable ?
I'm french by the way !
Romain