Unfortunately this setting is not currently available, but is something that you can add relatively easily with some custom code.
What you would do would be to add a custom field to each listing, and then increment that field for each view. You would need to create some custom javascript for that.
Then create a sort for listings based on that field, descending so the listings with the highest value are listed first.
Then make a new GD Listings element with the shortcode builder and your custom sort will be available so you can show the most often viewed listings first.
I have made a note of your request and it is something we will consider adding to future versions. In the meantime, if you need help with implementing it, please contact a GD Expert here:
https://geodirectoryexperts.com