This feature is only available for premium subscribers.
How to Set Up Your Google Tag Manager
Navigate to Settings > General.
Scroll down and click on Instagram, Meta & GTM, then toggle on Google Tag Manager.
Input your Google Tag Manager ID into the given field.
Click Save at the bottom of your screen.
How to Get Your Google Tag Manager ID:
Visit Google Tag Manager.
Create an account, if you do not have one.
Fill in your account name, country, and container name. Choose "Web" for target platform, then submit.
Locate your Google Tag Manager ID.