NOTE: If you are using a different account on this phone (different address attached to google) then you won't be able to get them. However, if you are using the same info as on you did on your old phone, this should work.
1. Open the "Google Photos" app.
2. Tap the photo you want to save to your phone.
3. Now tap the "Options" menu.
4. And finally tap "Restore".
5. Repeat for each image.
Or, to get them all at once...
1. Log into the google account associated with the app.
2. Download all the images to an empty folder on your computer.
3. Connect the phone to the computer via USB cord.
4. Copy the images over to the phone or sd card.