Granite Mountain Hotshots Commemorative Coin Act This bill directs the Department of the Treasury to mint and issue 50,000 $5 gold coins, 400,000 $1 silver coins, and 750,000 half-dollar clad coins emblematic of the fight of the Granite Mountain Hotshots against the 2013 Yarnell Hill Fire in Arizona. All surcharges received by Treasury from the sale of such coins must be paid to the Yarnell Fire District for the purpose of wildfire prevention and wildfire education.