To display maps, you need to fill in the coordinates of the places first.
Genealone: Log in as the administrator and go to Administration -> Places.
Genealone WP: Genealone WP plugin cannot display maps.
Genealone can help you to find the coordinates. You can click on Edit, then switch “Try to find the coordinates automatically” to yes and submit the form. Genealone will try to find the place and display the map. If you are happy with the result, you will need to save the form again.