Cause I want to have my emails safe

The [google] datacenters are at confidential, undisclosed locations in order to guard against user data being targeted. These facilities are protected with armed personnel around the clock. In addition, strong methods of entry protection such as biometric devices and secure token cards are used to ensure that only authorized personnel are granted access. Only select Google employees have access to the datacenter facilities and the servers contained therein, and this access is tightly controlled and audited.

Ref: google OS.