Another win for the Royals at the fortress Madejski Stadium will further establish the Berkshire-based side in the top six.
But Reading will once more have to do without injury-stricken winger Glen Little.
The 28-year-old former Bolton loanee, who has had an injury-plagued start to his Royals career, may be fit to return to the starting line-up for Tuesday's Carling Cup visit from Watford.
Meanwhile, Bobby Convey, who started on the bench against Preston, is unlikely to return to the starting line-up for tomorrow's game. Reserve team winger Paul Brooker is likely to be handed a left-wing role.
Nicky Forster, who scored a brilliant brace against Preston in midweek, will once more partner Dave Kitson up-front.
Despite a slow start to the season the duo are attempting to ignite Reading's campaign.
The little and large partnership fired three goals between them on Tuesday, so will hope to have put their somewhat poor early season finishing behind them.
Opponents Gillingham have only one injury concern heading into tomorrow's game.
Right-back Nyron Nosworthy will sit the game out, but Nicky Southall should deputise.
However, there will be no Madejski Stadium return tomorrow for former Reading striker Darius Henderson. The big frontman is currently on loan at Swindon Town.
The Gills drew 2-2 in midweek draw with Coventry and so could field the same team as the one that started at Highfield Road.
Andy Hessenthaler's side won two out of three games at the start of the season to top the early Championship table. But a disappointing run of recent defeats has seen the Kent side slip down the league.
The Gills were beaten 4-0 at home to Sunderland in their previous home game.
Probable Reading line-up: Hahnemann; Shorey, Williams, Ingimarsson, Murty; Brooker, Sidwell, Harper, Hughes; Kitson, Forster
Reading form (last five): WLWLW
Gillingham form (last five): LLWLD