Apple: Er, yes. Your iCloud stuff is now on Google's servers

You can't escape The Circle

If you chose the Apple ecosystem because you don't trust Google – bad news. Apple has confirmed for the first time that it now uses Google servers to store third-party data from iCloud users.…

via The Register - Data Centre: Cloud
http://go.theregister.com/feed/www.theregister.co.uk/2018/02/26/apple_icloud_on_google_servers/