Gibson earned his fourth shutout of the season and 16th of his career. He is 12-3-1 in his last 16 starts.
Francois Beauchemin had a goal and an assist for the Ducks, and Andrew Cogliano, Ondrej Kase and Hamphus Lindholm also scored for the Ducks, who've won four straight and are tied with Colorado for sixth in the Western Conference, one point ahead of the Kings.
Gibson made his best stops in the third period. A couple minutes apart, he stuck out a pad to deny Dougie Hamilton's one-timer, then turned aside Johnny Gaudreau on a breakaway as the Flames fell to 15-18-4 at the Scotiabank Saddledome and were booed off the ice after the game.