How do I move photos out of Gallery app to Google photos app?

[Android Central Question]

There are photos that show up under my Gallery app, but are not in Google photos. Is there a way to back up some of the Gallery photos to Google photos?
Pictures that are sent to me via text or other app seem to always land in Gallery app. Perhaps there is a setting to change that?

 

[B. Diddy]

Welcome to Android Central! On your Google Photos app, tap Menu>Device Folders -- do you see a folder there with those images? If so, tap the cloud icon associated with that folder, which will turn on cloud backup for that folder. Those images should now show up in your overall Google Photos feed.