Google Consent Mode Listener Tag for Google Tag Manager Web

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This utility template for Google Tag Manager (Web) listens for Google Consent Mode state transitions and pushes a standardized event to your dataLayer.

Setup Instructions

  1. Import the template from the Community Template Gallery into your GTM Web workspace.
  2. Create a new tag using the Google Consent Mode Listener Tag by Stape template.
  3. Configure the specific Consent Types you want to monitor (defaults to All Consent Types).
  4. Set your custom event name and dataLayer array name, if necessary.
  5. Assign a trigger that strictly follows your CMP execution (see the :warning: Critical: Execution Order section below).

:warning: Critical: Execution Order

This listener tag must execute AFTER your CMP has established the default consent baseline. If this tag fires before a default consent state exists, GTM’s native listener API will consider that consent state as granted, which can lead to inaccurate consent state reporting later when the user actually makes a choice and the update command is triggered.

Recommended Triggering Strategy:

  • Standard Implementation: If your CMP tag sets the default state using the Consent Initialization - All Pages trigger, you should fire this Consent Listener tag on the Initialization - All Pages trigger.
  • Tag Sequencing: Alternatively, use GTM’s Tag Sequencing feature to guarantee this listener tag fires immediately after your CMP tag completes its execution.

:stop_sign: Warning: Custom dataLayer Names & Gallery Unlinking

If your website uses a non-standard dataLayer namespace (e.g., myCustomLayer), you can configure this tag to use it, but it requires manual permission overrides (see below).

The Trade-off:

  • You must manually edit the template’s Accesses Global Variables permissions to explicitly allow read/write/execute access to your custom array name.
  • Modifying template permissions will permanently unlink this template from the GTM Community Gallery.
  • Once unlinked, you will no longer receive automated bug fixes, new features, or structural updates published by the repository maintainers.

Open Source

The Google Consent Mode Listener Tag for GTM is developed and maintained by the Stape Team under the Apache 2.0 license.

GTM Gallery Status

:red_circle: Not listed

GitHub

:green_circle: Repository