The default layout of the search results and category pages is set on the GD > Loop block (or [gd_loop] shortcode) inside the page templates. GeoDirectory v1 had a setting for this. In the current version you change the Layout option on the loop itself.

1. Go to GeoDirectory > Settings > General > Pages and note which pages are used as the Search Page and the Archive page.
2. Edit the Search Page.
3. Select the GD > Loop block and set Layout to List view. If the page uses the shortcode, change it to [gd_loop layout="0"].
4. Update the page.
5. Do the same on the Archive page, which is used for category and post type pages.

The layout values are 0 for list view and 1 to 5 for a grid with that many columns. The default is 2.

Why you may still see the old view

Visitors can switch the view with the button in GD > Loop Actions, and their browser remembers the choice. If you have switched the view yourself while testing, your browser keeps showing that view. Test in a private window to see what new visitors get.

To stop visitors changing the view, use the Hide layouts option on the GD > Loop Actions block to remove the views you do not want offered.

If you use a GD > Listings block on a normal page, it has its own Layout setting too. See GD > Loop for the other loop options.