Hi,
Okay so I’ve taken a look at your page and you have two issues.
1. You’ve included the script two times. you should only include google maps api once through functions.php using wp_enqueue_script.
2. In your file acf-maps.js, remove the top <script> line. That’s HTML code and it wont work (and shouldn’t be) in a js file.
Do these and I think you’ll find it working!