Hi @mikelweb
For something like that, you need to use a click event to watch the markers, and then add the data to a hidden form. Here’s an example of a click event: https://developers.google.com/maps/documentation/javascript/examples/event-simple. For further support on how to get the markers data and add it to a form, kindly ask Google Maps Community instead.
For the submitting process you can use acf_form() and hide it. This page should give you more idea about it: https://www.advancedcustomfields.com/resources/create-a-front-end-form/.
I hope this helps 🙂
