They would not - GP was probably bringing up something not directly relevant, but still related. (they should have clarified though)
What can I add? I know the domain could be found. But how did Google index a page that is example.com/$MD5.html - guessing 128bit numbers is hard.
I have visited that page from a signed-in Chrome profile.
That assumes it was using it from the get go and every time, which might not be a safe assumption.