In LSGG it's the same as everywhere else. Emergency code displayed at all working positions, no aural alarm, and indication of the type of emergency with the label forced in red: EMG - RCF - HIJ
In the case of the pic are not able to set the emergency squawk, we have the opportunity to display it manualy when the pilots annonce an emergency. Just push a specific menu on the label, and the info EMERGENCY if forced to all working position.