Zungu joined Super Eagles star Joe Aribo and Glen Kamara in the middle of the park, and he was in action for 60 minutes before he was replaced by Ryan Jack.
During the encounter, the Bafana Bafana midfielder made two key passes and managed just a clearance but he neither registered a shot nor completed a tackle.
Aribo, however, played the entire duration while his compatriot Leon Balogun watched on as an unused substitute for the fourth straight game.
Balogun is yet to play for the Gers since their 1-1 draw against Motherwell on January 17.
Despite his recent inactivity, Gerrard reiterated his faith in the Nigeria defender with the club waiting to trigger the extension clause in his contract.