Hello!
Not sure if it's allowed, but i haven't found any converter that works to extract infos from GCS and migrate them to FG. So i've started to create one. For now you can convert only skills, i'll do Traits/Spells/Vehicles/Equipments and everything when i have time. If anyone is interested, fell free to contribute.
Repository: https://github.com/YgorCastor/fangurps
Requires: Java 14
How to: java -jar fangurps convert-skill --help