According to a gaming system 300, when BET information has been received from a gaming machine 1, it is determined either no offer of a special payout to the gaming machine 1 of a transmission source of the BET information, or a size of the special payout to be offered to the gaming machine of the transmission source of the BET information is determined, in the external control device 200. When the size of the special payout has been determined, a numeric symbol is displayed to each of display regions from a first display region 500a to a fifth display region 500e in a lower image display panel 141. A sum of numeric values corresponding to a predetermined number of these numeric symbols is a total point value corresponding to the size of the determined special payout.