You have uploaded a large amount of pictures and videos on Google Drive and want them to be available in the photo libraty of your Google + profile! Simply follow the below procedure:
Connect to your Google + account.
Click on Home > Settings.
Scroll to the "Google Drive" section and check "Show Drive photos and videos in your photo library"
All the JPG, GIF, WebP, RAW and video files stored on your Google Drive will be available in the Google Drive photo library (they will have a small Drive icon), simply choose the one you want to share.