New Gtag GT-XXXXXX

I was asked by a client about a tag on a website that started with GT. GTM is tag manager, UA-, is Universal Analytics, G- is Ga4 and AW- is Adwords tracking.

So what is this mysterious GT Google tag?

PrefixID typeDescription
GT-XXXXXXGoogle tagEach newly created Google tag gets a GT prefix and unique ID.
G-XXXXXXGoogle tag (legacy prefix)Google Analytics 4 tags are Google tags with a G prefix and unique ID.
AW-XXXXXXGoogle tag (legacy prefix)Google Ads tags are Google tags with a AW prefix and unique ID.
DC-XXXXXXGoogle tag (legacy prefix)Google Floodlight tags are Google tags with a DC prefix and unique ID.
https://developers.google.com/tag-platform/devguides/existing

From the official Google documentation, it looks like a new tag they are going to be introducing.

From Bard.


A GT-Google tag is a single tag that you can add to your website to use a variety of Google products and services. It is a newer version of the global site tag (gtag.js) and it has a number of advantages, including:

  • It is more efficient and uses less bandwidth.
  • It is easier to implement and manage.
  • It supports more features, such as cross-domain tracking and enhanced measurement.

I have yet to see it in the wild myself but this is what I got asked about. If you know any different, let me know and I will update.

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