Here is a checklist for map related settings.
1# GD > Design > Maps – Valid Google Maps API Key created and saved
2# Places > Add Category – Create at least one Place Category, and add that category to your listing.
3# GD > Design > Map > SHOW / HIDE POST TYPE AND CATEGORY ON MAP – Make sure your CPT (Places etc) and your category are set to show on the map.
4# Review the basic setups docs here: https://wpgeodirectory.com/docs/basic-installation/
5# Make sure you are running the latest version of the plugin
6# Check your site for plugins known to cause conflicts https://wpgeodirectory.com/docs/known-issues/