Inserire nel file head.tpl

{literal}
<!– Global site tag (gtag.js) – Google Analytics –>
<script async src=”https://www.googletagmanager.com/gtag/js?id=UA-xxxxxxxxx-1″></script>

<script>
window.dataLayer = window.dataLayer || [];
function gtag(){dataLayer.push(arguments);}
gtag(‘js’, new Date());

gtag(‘config’, ‘UA-xxxxxxxxx-1’);
</script>

{/literal}