Script snippets used in blog article: Use Google Tag Manager and Iubenda to adopt the cookie law requirements inline with GDPR - https://www.mbwebstudios.co.uk/blog/use-google-tag-manager-and-iubenda-to-adopt-the-cookie-law-requirements-inline-with-gdpr

Iubenda Cookie Solution - After.html

<script type="text/javascript">
    var _iub = _iub || []; 
    _iub.csConfiguration = {
        "cookiePolicyId":XXXXXXX,
        "siteId":XXXXXX,
        "lang":"en",
        "callback": {
          onConsentGiven: function(){
            dataLayer.push({'event': 'iubenda_consent_given'});
          }
        }
    };
</script>
<script type="text/javascript" src="//cdn.iubenda.com/cookie_solution/safemode/iubenda_cs.js" charset="UTF-8" async></script>

Iubenda Cookie Solution - Before.html

<script type="text/javascript">
    var _iub = _iub || []; 
    _iub.csConfiguration = {
        "cookiePolicyId":XXXXXXX,
        "siteId":XXXXXX,
        "lang":"en"
    };
</script>
<script type="text/javascript" src="//cdn.iubenda.com/cookie_solution/safemode/iubenda_cs.js" charset="UTF-8" async></script>