Hi Dave,
It seems that you've created a marketing form and got generated script under Form hosting tab.
The script will works for rendering the form and track contact behavior once you paste it on a marketing page.
As far as I know, Google analytics is another service to track website vistior behavior, it has Java, PHP, and Python version.
(I'm not sure whether analytics.js would be also part of it.)
Could you share more details that where do you want to embed script?
As per my understanding, would your "Google analytics" actually means a web page that has embedded the service?
We couldn't do any customization on the generated script and integrate it with other service, all track data will be processed to marketing application own back-end.
Regards,
Clofly