KIO GDrive allows you to access and edit your Google Drive files using KDE applications that support KIO.
You can use the gdrive kioslave like this:
The first URL shows an OAuth login dialog from Google, if no Drive account has been authenticated yet, or the list of your authenticated accounts instead.
gdrive:// URL can also be used at any time to add an additional account.
gdrive:// lists all the files and folders
from the top level of the
firstname.lastname@example.org Drive account.