GSU requires all internal devices to only use their NTP server so we need to change the default NTP servers.
$ sudo nano /etc/ntp.conf
Scroll down to NTP servers and add
server ntp.gsu.edu iburst
Comment out all other servers and the following two lines
restrict 127.0.0.1
restrict ::1
Exit and run
$ sudo /etc/init.d/ntp restart
Verify with $ date