The best way to link your Google My Business listing to your website is to embed a Google Map of your Google My Business listing.
Follow these steps here:
1. Go to google.com/maps and enter your business name to pull up your Google My Business listing.
2. Click on the “Share” button.
3. Click on “Embed a Map”.
4. Click on “Copy HTML”. Paste this code into your website.
5. It should look like this when you are done.
Further Reading: https://en.support.wordpress.com/google-maps/