add_action('wp_head', 'tosca_google_tag', 1);
function tosca_google_tag() {
    ?>
    <!-- Google tag (gtag.js) -->
    <script async src="https://www.googletagmanager.com/gtag/js?id=G-92BJJFSB3B"></script>
    <script>
      window.dataLayer = window.dataLayer || [];
      function gtag(){dataLayer.push(arguments);}
      gtag('js', new Date());
      gtag('config', 'G-92BJJFSB3B');
    </script>