Luguentz Dort had been sidelined since Feb. 12 with a shoulder injury, underwent surgery in Los Angeles with Thunder medical personnel.
Early in the third quarter against the Pacers, Gilgeous-Alexander tried to drive to the basket but stepped on Justin Holiday's foot.
Rookie guard Josh Giddey added 19 points for the Thunder, who jumped on a weary Nets team to snap a five-game losing streak.
Gilgeous-Alexander had the first triple-double by a Thunder player at home since Russell Westbrook during the 2018-19 season.