In his senior season, he averaged 27.2 points, 10.5 rebounds, 3.2 assists, and 3.3 steals per game, and was named the state's Division II Player of the Year, finishing second in Mr. Basketball voting behind LeBron James.

In Gansey's freshman season of 2001–02, he averaged 8.3 points and 4.7 rebounds, mainly coming off the bench, and was named to the all-newcomer team in the Atlantic 10 Conference.

However, the St. Bonaventure basketball program would be rocked by an academic scandal during that season, when it was revealed that a junior-college transfer had been admitted to the university by virtue of a welding certificate.

During a strong late-season run, Gansey and teammate Kevin Pittsnogle were the main keys to turning the Mountaineers from an NCAA tournament "bubble team" to a regional finalist that lost its bid for the Final Four in overtime against Louisville.

He signed as an undrafted free agent with the Miami Heat in July 2006,[9] and played in summer league games, but was waived before the season.

Hired as the team's general manager prior to the 2015–16 season, Gansey held a leadership role in the Charge's front office since 2012.

[14] On July 26, 2017, Gansey was promoted to assistant general manager of the Cleveland Cavaliers, serving under GM Koby Altman.

[15] On February 23, 2022, Gansey was promoted to general manager of the Cavaliers, serving under president of basketball operations Koby Altman.