Gillen's points came on 8 field goals and 2 of 4 free throws during the game.
Kendall Humphreys added 6. North Montgomery fell to 3-15 overall while Greencastle improved their record to 1-0.
Player of the game
North Montgomery's next game is scheduled to be played at DCHS on Friday Jan. 11 at 3:00pm versus Danville.