Hi @nion
I’m afraid this question is more related to Google Map instead of ACF. Here’s documentation about info windows where you can show additional information (including the address) when the marker is clicked: https://developers.google.com/maps/documentation/javascript/infowindows. You can also check this thread that has a similar topic: http://stackoverflow.com/questions/5868903/marker-content-infowindow-google-maps.
For further support, please visit Google Map Community instead.
I hope this helps 🙂
