This gallery uses the native features of Nation Builder.

Pros:

1. All content is located within Nation Builder (unlimited storage?)
2. Once the page is set up, new images can be added by uploading them on the "Files" tab for the page.

Cons:

1. Initial set up is not intuitive and requires some code editing on the "Template" tab.  
2. Display is static.
3. Clicking the media loads a new page and simply displays the image.  The new page doesn't have any controls or info letting the viewer know to click "back" to get back to the gallery.