Kelly Olynyk had 12 points, and former Kentridge High star Gary Bell Jr. and Elias Harris added 11 each for the Bulldogs (11-1), who shot 61 percent in taking a 49-24 halftime lead.
The Camels (3-8) were without leading scorer Darren White (21.9), who missed his fourth straight game with a hand injury. Trey Freeman had 17 points, and Darian Hooker added 11 for Campbell, playing its first game in the state of Washington.
Gonzaga led by as many as 31 points in second half before a Campbell run combined with a GU cold spell trimmed it as the game got sloppy in the final 13 minutes.
In the first half, which was highlighted by a late 13-0 run, Gonzaga made all 13 of its free throws, had a 19-9 rebounding advantage and forced nine turnovers by the Camels, who shot 36 percent.