On system firmware version 1.02 of the GMC 600Pro, the alarm does not trigger when turning off beep/click. If this has been fixed in a firmware update, please tell us where to get the new firmware, so that everyone reading this thread can get the new firmware too.
No, the alarm does not sound at all. The alarm does not trigger. Turning off beep/click turns off all sounds, including the alarm. Even when the alarm is turned on. Can you please try this on production hardware? I believe this to be a firmware error on every single GMC 600Pro.