gcsfuse
is a tool that needs to be installed on the actual VM. According to the documentation (for Debian jessie):
1 - Add the gcsfuse distribution URL as a package source and import
its public key:
export GCSFUSE_REPO=gcsfuse-`lsb_release -c -s`
echo "deb http://packages.cloud.google.com/apt $GCSFUSE_REPO main" | sudo tee /etc/apt/sources.list.d/gcsfuse.list
curl https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo apt-key add -
2 - Update the list of packages available and install gcsfuse.
sudo apt-get update
sudo apt-get install gcsfuse