겠군요 = You/It Must be…
This Korean grammar point is used to assume or predict, someone’s situation or feelings though information gathered.
Example of 겠군요:
우리 아버지는 너무 화나겠군요. = Our farther will be very angry.
아 그래, 누나가 너누 행복하겠군요. = ah really, my older sister will be very happy.
그녀는 감기거리겠군요. = She’s going to get sick.
피곤하시겠군요. = You should be tired.