Google Maps
With an API key from the Google Maps SDK, it is possible to use Google Maps backgrounds within Icon Map Pro.
API Keys can be obtained from the Google Maps platform on the API Keys tab. Ensure that your API Key has access to background maps. The API Key should then be pasted into the Google Maps box within Icon Map Pro's API Configuration area in the formatting settings. Ensure that the API key has access to the Map Tiles API and the Maps JavaScript API.