Gort is the Android client of Barada (Barada Ain't Respecting Any Devious Adversaries) which is a two factor authentication client for your phone. Your phone stores a secret key, you enter a secret PIN, and Gort generates a one time use password that you an use to log into any system that supports Barada. See http://barada.sourceforge.net for details of how to set up OTP/HOTP for your system.
Allows the application to access the phone features of the device. An application with this permission can determine the phone number and serial number of this phone, whether a call is active, the number that call is connected to, ect.