The former Port Vale goalkeeper may be thrust into the action after Wes Foderingham's mistake against Hearts.
The Rangers goalkeeper put in a good display in the 1-0 win against Inverness Caledonian Thistle at Ibrox.
Ibrox side Glasgow Rangers bounced back from a midweek disappointment to beat the Dons.
The Rangers defender has backed his goalkeeper to keep getting better.
Mark Warburton’s Glasgow Rangers are second in the Scottish Premiership table at the moment.
Mark Warburton’s Glasgow Rangers won against Kilmarnock at Ibrox in the Scottish Premiership on Saturday afternoon.
Glasgow Rangers boss Mark Warburton has picked Gilks for the majority of the club's cup games this term.
The two goalkeepers are fighting it out for the Rangers number one spot.
Mark Warburton’s Glasgow Rangers will face Old Firm rivals Celtic in the semi-finals of the Scottish League Cup this weekend.
The centre-back has made just two appearances for Glasgow Rangers since joining Mark Warburton's side in the summer.