I admit to not being fully versed in GDrive, but can't you grab them in Picasa and then find them 'anywhere'?
This will be something I will need to get a grasp on soon, so any advice/experience would be appreciated.
Edit: Apparently I am painfully wrong:
http://productforums.google.com/forum/#!topic/drive/iAqMDex_RDo
Google wants you to use Google+ for photo sharing, apparently. This is kinda botched, IMHO.
Google, Microsoft and Apple are not implementing the cloud correctly while Dropbox just sits there doing it right. It is confounding.