From reading the description it looked like you could "Transfer files between iDevice and Google Drive" but this is misleading. You can only download from Google Drive to the local folder, the functions to move files (pics) from your iPhone to the local folder do not work. I assume once in the local folder it is possible to upload to Google, but without being able to move files into local I wont be testing that. :-(
Dale_4S about GDrive for Google Drive, v1.0.3