Gurianov had a breakout season for the Dallas Stars in 2019-20.

The native of Togliatti, Russia, was the only player on the Stars to reach the 20-goal mark during the regular season. He continued to produce during the Stanley Cup Playoffs, finishing with 17 points (nine goals, eight assists) in 27 games. His biggest goal came in Game 5 of the Western Conference Final, when he scored in overtime to put the Stars into the Stanley Cup Final for the first time since 2000.

Gurianov was traded to the Montreal Canadiens by the Dallas Stars for forward Evgenii Dadonov on Feb. 26, 2023. He signed a one-year, $850,000 contract with the Nashville Predators on July 11. He had one goal and one assist in 14 games before he was traded to the Philadelphia Flyers for Wade Allison on March 8, 2024.

Gurianov's first season in North America was 2016-17, when he scored 25 points (10 goals, 15 assists) in 54 games with Texas of the American Hockey League, had seven points (four goals, three assists) to help Russia finish third in the 2017 IIHF World Junior Championship, and made his NHL debut April 8, 2017, for the Stars in a 4-3 win against the Colorado Avalanche.

After playing the 2017-18 season with Texas, the speedy forward rejoined Dallas early in 2018-19 and scored his first NHL goal in his second game, a 5-4 overtime loss to the Nashville Predators on Nov. 10, 2018. Gurianov began 2019-20 with Dallas and had his first multigoal NHL game Oct. 24, 2019, scoring twice in a 2-1 win against the Anaheim Ducks.

Selected by the Stars in the first round (No. 12) of the 2015 NHL Draft, Gurianov played with Togliatti of the Kontinental Hockey League in 2015-16 before signing a three-year, entry-level contract with Dallas on May 12, 2016.