grive is the Google Drive client for GNU/Linux. In Ubuntu 13.04, 13.10, 14.04, 14.10 and 15.04 grive is in the universe repository. To install grive in Ubuntu 13.04 and onward search for grive in the Ubuntu Software Center and install it, or open the terminal and type:
sudo apt-get install grive
or just use this link: grive .
grive no longer works because Google has discontinued service for Google Documents List API version 3.0, replacing it with a new API.
google-drive-ocamlfuse is a FUSE filesystem backed by Google Drive, written in OCaml. It lets you mount your Google Drive on Linux, but it is a stopgap solution that is missing working offline.
How to install google-drive-ocamlfuse:
sudo add-apt-repository ppa:alessandro-strada/ppa
sudo apt-get update
sudo apt-get install google-drive-ocamlfuse