We have just released the latest version of GreenTools for Google Apps (G4G) which includes commands and subprocedures to work with Google Drive files.
At the moment you can list files as well as upload files (either to the root or any folder). More features and options will be added later. We like to hear from our customers and how they work with these applications so we know what features are important.
Visit our site to download and try things out or view the documentation!