 His senior year of high school Gabas was the captain of the team and averaged 18 points and 8 rebounds.In January during his senior year of high school, Gabas committed to Dartmouth College to play Division 1 basketball in the Ivy League for coach Paul Cormier.Gabas had a very successful career at Dartmouth College, appearing in 102 games and starting in 91 of them for the Big Green.