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?
| Prefix | ID type | Description |
|---|---|---|
| GT-XXXXXX | Google tag | Each newly created Google tag gets a GT prefix and unique ID. |
| G-XXXXXX | Google tag (legacy prefix) | Google Analytics 4 tags are Google tags with a G prefix and unique ID. |
| AW-XXXXXX | Google tag (legacy prefix) | Google Ads tags are Google tags with a AW prefix and unique ID. |
| DC-XXXXXX | Google tag (legacy prefix) | Google Floodlight tags are Google tags with a DC prefix and unique ID. |
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 It is a newer version of the global site tag (gtag.js) and it has a number of advantages, including: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.

Ben Luong is a technical marketing consultant who operates where AI falls short. In a world flooded with cheap, mediocre code and automated strategies, he provides the expert integration, verification, and strategic accountability required to make modern marketing stacks profitable. He specialises in architecting Google Ads, SEO, and GA4 into a single, high-performance system that is accountable to the bottom line.
