There was a previous thread for specifying zoom in the google map field that was for ACF v4:
http://support.advancedcustomfields.com/forums/topic/specify-zoom-in-google-map-field/
How can this be done for ACF 5? The javascript part is the same but the file google-map.php has been changed.
never mind, I was changing the acf-input.js file and forgot that ACF loads the minified version, lol