Support for Google Tag Manager's "Consent Initialization" trigger

I've created a sandbox module that does this here:

https://www.drupal.org/sandbox/jrb/3433126 →

In order for this to work, the Google Tag Manager gtag script must be included on the page by some other method. This can be done with a custom script or with a module like Google Tag → .

Just enable this module; and, when the user consents to cookies, it will call gtag with this:

gtag('consent', 'update', {
  'ad_user_data': 'granted',
  'ad_personalization': 'granted',
  'ad_storage': 'granted',
  'analytics_storage': 'granted'
});

Depending on what the maintainers of this module would like to do, this code could be folded into this module as a submodule or I could release it as a full module. Either way is OK with me.

I think probably this is the way to go? https://www.drupal.org/project/eu_cookie_compliance_gtm → which seems to connect the google_tag and eu_cookie_compliance modules. I did notice ✨ Make the module compatible with Google Consent Mode RTBC is still work in progress there though.