The Gills must avoid defeat against the Spireites to have any real hope of making the play-offs, but they are hampered by being without skipper Fuller, who suffered a bruised knee against Macclesfield last week.
Centre-half Gowling remains sidelined with the ankle problem that has seen him miss the last two matches but he, along with Fuller, could return should the Gills secure a place in the season finale.
Meanwhile, defender Simon King is a doubt after being replaced at half-time against the Silkmen with a tight hamstring, while veteran midfielder Kevin Maher is struggling with a virus.
Winger Andy Barcham (hamstring) and midfielder Curtis Weston (knee) face late fitness tests, while Mark Bentley should be fit despite a bruised back.
Should Andy Hessenthaler's men better a result attained by either Stevenage or Torquay, who play Bury and Rotherham respectively, they will secure a play-off spot.
Source: PA
Source: PA