You can easily add Google maps without API key and with just simple address string of the location, just make sure you replace the blank spaces with + sign before call to the Google maps.
Here is the code to be added in your php template file:
<strong>Map Location</strong> <br>
<iframe width="640" height="480" frameborder="0" style="border:0" scrolling="no" marginheight="0" marginwidth="0" referrerpolicy="no-referrer-when-downgrade" src="https://maps.google.com/maps?q=<?php $location = str_replace(' ', '+', $location); echo $location; ?>&output=embed" allowfullscreen></iframe>
<br>
Hope that helps!
