> For the complete documentation index, see [llms.txt](https://gitbook-open-v2-preview.gitbook.workers.dev/url/gitbook.com/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://gitbook-open-v2-preview.gitbook.workers.dev/url/gitbook.com/docs/help-center/integrations/does-gitbook-support-google-tag-manager.md).

# Does GitBook support Google Tag Manager?

No, GitBook does not integrate with Google Tag Manager. This is because it allows the injection of CSS/JS, which can often break sites. Additionally, there are security concerns associated with injecting code.


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