Barnett missed the 3-0 win over Stockport in midweek with an ankle injury and faces a late fitness test to determine whether he will be available against the in-form Gills.
If the midfielder fails to be passed fit, Sean McConville is likely to start.
Stanley are still without full-back Leam Richardson, who has missed the last five games with a groin problem, while striker Rory Boulding is still unavailable as he sits out the final game of his three-match suspension.
Defender Kevin Long returned to the Stanley squad against the Hatters following a hamstring injury and is pushing for a starting place as Accrington look to extend their unbeaten run to six games.
Source: PA
Source: PA