JuiceFS supports GCS and can be used in GCP, we have customers use it for data scientists. JuiceFS is free if you don't have data more than 1TB. Discloser: Fou

JuiceFS supports GCS and can be used in GCP, we have customers use it for data scientists. JuiceFS is free if you don't have data more than 1TB. Discloser: Founder of JuiceFS here