
Dear Curious SKSK,
Good day! Thank you for posting to Microsoft Community. We are happy to help you.
Based on your description, we understand that you want to analyze SharePoint's Web usage with Google Analytics.
First of all, to answer your question, if you use Google Analytics, your data will be disclosed to Google. Since this is a third-party application, we do not recommend you to use Google Analytics.
In addition to the site analysis features that come with SharePoint, you can also export usage reports from the administrator Center: View usage data for your SharePoint site (microsoft.com) &Microsoft 365 admin center SharePoint site usage reports - Microsoft 365 admin | Microsoft Learn
I hope the above information will be helpful to you.
Sincerely,
Tin | Microsoft Community Moderator