Ally McCoist's team will face League Two outfit Rovers at Livingston in the Ramsdens Cup first round unable to play all of their seven summer signings.
The Glasgow giants are still operating under a transfer embargo but McCoist plans to field their new arrivals as trialists until the ban expires on September 1. However, Scottish Professional Football League rules mean that only two trialists can be fielded against Sunday's Coatbridge opponents.
That has left the Gers boss to decide whether former Kilmarnock stopper Bell will get the nod to make his Light Blues debut or instead start with reserve keeper Gallacher. But Bell insists his 24-year-old rival - who McCoist plans to send out on loan once a replacement is signed - is good enough to do a job between the sticks.
He said: "Scott has been fantastic to work with. I saw him a few times in reserve matches last season and he is a very good goalie. He just needs games under his belt so I know it's not an easy ride for me whether it's Scott or someone else who comes in.
"Scott's got great ability and I have no doubts he will do well in the games. It's a fantastic opportunity for him."
Bell quit Rugby Park at the end of his contract in May but he may find himself playing only a bit-part in the first month of the new campaign.
Only players moving from Scottish sides can play as a trialist - ruling out Ricky Foster, Stevie Smith and Arnold Peralta - and no more than two can feature in the Ramsdens Cup opener.
None at all are permitted in the second round of the lower-league tournament or against Forfar in the first round of the Scottish League Cup.
And in League One, just two trialists are permitted in any game, but each individual can only play three games before they must be registered, leaving McCoist with a juggling act as he selects his team.