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