Need some pointers on how to put Generatepress to a specific use

Hello, first of all, let me say that this theme is one of the best theme that I have ever come across in wordpress.

I have a query and I hope I can get some insights from people here.

I want to have a layout like this , refer screenshot

https://www.dropbox.com/s/a5v7d3zzmkbsatv/Screenshot%202019-06-24%2020.39.39.png?dl=0

it can be seen in action here too

https://www.gearhungry.com/best-arm-blaster/

after the featured image, there are three product boxes.

Any pointers, how can I achieve this?

Thanks in advance.