You can add header codes to the < head > section of your site for verification or authorship approval by using Yondo's Custom Header Function. Header code supported services include Google Search Console, Google+, Bing Webmaster Tools, Pinterest Verification, Facebook Pixel, and more!
For Google verification here is a Google article on how to obtain your Google Tag. You will want to scroll down under the Verification Methods and click on HTML Tags.
Please note if you are using a Domain Alias for your Yondo pages you will want to use the Google Domain Name Provider method.