function add_google_tag() {?>
  
<!-- Google tag (gtag.js) --> 
<script async src="https://www.googletagmanager.com/gtag/js?id=G-H75ENPM26K"></script> <script> window.dataLayer = window.dataLayer || []; function gtag(){dataLayer.push(arguments);} gtag('js', new Date()); gtag('config', 'G-H75ENPM26K'); </script>

<?php 
    
}
add_action( 'wp_head', 'add_google_tag' );