Then search for grive in the dash and follow the installers instructions.
Enter Y to continue, and now google drive grive tools is installed. Now Grive has been successfully installed. Now search for Grive and click on Grive setup from search bar of Ubuntu, then you will get the following wizard just follow it
This wizard will ask you to paste authentication code here, just paste it and continue, google drive will now sync. All done now, enjoy files sharing with google drive.