Even though freeip.me says it keeps only aggregate numbers, running Google Analytics means Google receives data about your visit and handles it under Google's rules, not freeip.me's. The policy does not explain what Google does with it — it just links you to Google's own documents. This is a common and clearly disclosed setup, so the impact is minor, but it does mean a third party is in the picture.
“For further information, refer to the Google Analytics policies:”
What you can do — If you would rather not be counted, use a browser that blocks trackers or install Google's Analytics opt-out add-on.