Image gallery for deals page

Hi, its really a awesome plugin! But I have a difficulty and I need help.

I need add a image gallery in my deals, but I don’t know how to do this.
I saw in the demo site of the plugin that has some deals with image galleries, so I know I can do it in my deals too, but I need some help for that.

The demo site of the plugin is https://demo.wpdeals.me/
And this deal was that I saw the image gallery https://demo.wpdeals.me/daily-deals/casetagram-iphone-5-case/

https://www.ads-software.com/extend/plugins/wp-deals/