Can passing of a gallstone kill you ?

Unlikely: ...Unless one does not see a doctor for proper care. If untreated, i suppose a neglected stone stuck in the bile duct could result in serious liver damage, possible infectious cholangitis & possible severe pancreatitis. If treated with a doctor in a timely fashion then mortality rates should be low (unless there are other underlying medical problems).

Unlikely: but it can happen. If the stone gets stuck in the major bile ducts, it can lead to a back up of bile causing cholangitis, which can be a life threatening condition if not promptly treated. You can also get pancreatitis or bowel problems with the passage of a stone. If you have pain or symptoms, seek prompt medical attention. Good luck!