Use our Google Tag Manager Monitor template to capture and send GTM events to your Unless account.
If you are using Google Tag Manager to create and manage custom marketing tags, you can use the Unless GTM Monitor template to capture their names, associated monetary values and (optionally) email. This will allow you to use those events for audience segmentation and goal tracking, or - if you pass on the email address - identify visitors.
Starting is super easy. Simply go to this article and follow the instructions.