I did one some time ago using ACF and WP Google Maps Pro’s mashup feature, using our shortcode method, but I do not have a copy of the template I used any more. As the loop to output the posts was run, they were piped into a sting variable, and another string variable had the mashup shortcode being added to (with the IDs of the maps), and then both string variables were output to the page when the loop finished.

This post (now two years old) discussed it:

https://support.searchandfilter.com/forums/topic/google-maps-integration-2/#post-175289

Note that, whilst later than we hoped, V3 is now due to be released soon, but V3.0 will most likely not have the geolocation feature. That will more likely be left to V3.1 or even V3.2.