Open the Manage Content menu, and click on Change Feature
Click on POWr in the left column, and add Photo Gallery Plugin with the Use It button
Click Publish in the iBuildApp editor
Set Up POWr Photo Gallery
In your iBuildApp Editor, find the Settings Icon in the top right corner of your Photo Gallery Plugin. Click it to open the POWr Editor. In the POWr Editor, click Import Existing Photo Gallery, find Photo Gallery- and click Copy.