This module provides a simple integration for Google Tag Manager in Drupal. It allows you to configure your Google Tag Manager ID and choose whether to enable or disable the integration, and also whether to display it on admin pages.
Google Tag Manager simple integration
* About: https://tagmanager.google.com
Settings:
* GTM-ID field
* Enable/Disable flag
* Display on /admin/* pages flag
See Also
If you want more options use https://www.drupal.org/project/google_tag