With Calgary down 3-1 after 40 minutes, Matthew Tkachuk scored his second goal of the game with the pass coming from his frequent partner in crime, Gaudreau, to set his century high-water mark and make it 3-2.
It eclipsed the 99-point season he had in 2018-19.
Earlier in the game, Tkachuk scored his 35th of the season, besting his previous high of 34 goals from that same 2018-19 campaign.
Andrew Mangiapane then scored to tie it 2:38 later before Noah Hanifin stepped into a blast on the powerplay for the game-winner.
Hanifin was coming off a four-point performance with a quartet of assists in the Flames 4-1 win Saturday in Seattle.
Tkachuk added an empty-netter to finish off his second career hat-trick.
Jacob Markstrom made 12 saves on 15 shots in the first 40 minutes, with Dan Vladar playing the third period and going 7-for-7.
It was The Johnny Watchright off the hop with fans fired up to see the star get point 100.
Less than a minute in, he tried feeding Mikael Backlund on a 2-on-1 but his pass hoped over No. 11's stick.
Matty Beniers - the second-overall pick in the 2021 entry draft - made his NHL debut for the Kraken after being signed to a three-year entry level contract on Sunday.
He didn't waste much time getting his first NHL point.
The Kraken opened the scoring with 5:47 left in the first, Beniers feeding a cross-ice pass to Ted Donato, who one-timer beat Markstrom as he lunged back across his crease.
The Flames answered back off a rush, Rasmus Andersson curling inside the Seattle zone and feeding the puck back to D-partner Hanifin as he gained the zone, his wrister tipped home by Tkachuk at the side of the net.
