An open source Linux client for Google Drive
Grive. Yes that’s what it’s called. It is an open source implementation of Google Drive client for GNU/Linux. Currently as of version 0.2.0, grive can do two-side synchronization between the Google Drive and local directory. It can download and upload changed files. New directories in Google Drive and local directory will also be downloaded/uploaded.
You can find the directories and details on gitHub here.