GDV2 uses a new template system so you have a lot more control over how GD info is presented.
This page is using the archive template. You can adjust how many listings are shown in a row with GD Loop, layout=4 for example.
https://wpgeodirectory.com/docs-v2/geodirectory/design-elements/#gd_loop
Read more about the archive template here: https://wpgeodirectory.com/docs-v2/templates/archive/
You can add a map to the tempalte with a map shortcode, GD Map. You can find all the shortcode parameters in the shortcode builder: https://wpgeodirectory.com/docs-v2/geodirectory/shortcode-builder/
It looks like you are using the default content for the archive item. You will want to adjust that. It looks from your old site like you only want to use GD Post Images, GD Post Title, and GD Pinpoint.
https://wpgeodirectory.com/docs-v2/templates/archive-item/
Steps to edit the archive page template
Open WP Backend -> Pages
Search “gd”
Find and edit GD Archive
Find the shortcode builder
Add a GD Map shortcode