Gary is seen near the middle of the film keeping watch over the entrance to the asylum, along with other wolves. He is alerted of Nick Wilde's presence as the fox slips by him and hides behind the gate.
Gary catches Nick's scent and starts to track him down, but Judy Hopps begins howling to distract him. He joins in with his own howls but is quickly silenced by his colleague, Larry.
Judy continues to howl, forcing Gary to continue as well, inadvertently causing every other wolf standing guard to join in.
Gary often puts his paws in the "beg" position of a dog.