If so, how can I use it on our system? Thanks.
You can add Google Analytics code to portal's footer or application's footer.
Is there any way I can see the result from Google Analytics displayed in our system?
Sure you can embed Google Analytics in an iframe on any page, or you can create a Web Tab to do this for you.
Hope this helps,
Matt
How about linking automatically the gmail of the current user, without prompting user to login their gmail account?
BTW, Thanks for the reply Sir Pavel and Matt.