The young 'keeper is an Austria Under-21 international, but never made an appearance for Bayern Munich's first-team.
Bristol City boss Lee Johson believes that signing the youngster is a gamble that may prove successful.
"I believe he needs to earn his stripes and previously he’s been a training goalkeeper really at a top club," Johnson told Bristol City's official website.
"There’s no compensation for actually playing games, so we’ll look to get him a loan club somewhere. It’s a bit of a punt but one we think is worth taking".