Hey Jonah!
Thanks for reaching out. It’s cool that you’re trying to customize your Google Maps. Sadly, I don’t see anything specific about this as a customization in our Extensions library.
It sounds like you want to do, since you are on a single event page, is grab the date and time from the page itself. You can do that with jQuery as follows:
var startDate = jQuery('.tribe-event-date-start).text();
var time = jQuery('.tribe-event-time').text();
You may need to format that info more to your liking, but it should help you get started with adding that information in.
Happy customizing!
Neal