The 20-year old A-League Goalkeeper of the Year has had to postpone a 10-day training spell with 'Gers due to injury but could still head over Glasgow to try his luck with Ally McCoist's side.
"Mat's going for a trial for the right to play Elgin City, Montrose, Clyde and Stirling Albion. It is absolutely ridiculous," said Bosnich.
"This is one of Australia's top talents and he has to go down to the fourth tier of Scottish football?
"I don't know what he's thinking. And I don't know what the club is thinking. His management have a lot to answer for if they let him go there."