Your Google Tag Manager tag can be tweaked on a per-tour basis. You can determine the settings differently for every tour.
1. Open your tour in edit mode
2. On the left-hand panel, access the settings with the ‘cog’ icon highlighted
3. After opening the settings, drop down the integration tab that is now visible
4. You can now insert any script you want in HTML or Javascript
5. Once you are done, select ‘Google tag manager’ to insert your Google Tag Manager ID
6. Optionally you can disable the global tag manager ID inclusion
7. Click Update to save your changes