"He's excited, we're excited to have him, let's be honest," Gibson said. "It's a great challenge for Trevor, and he's up to it."
Bauer was the third overall pick in the 2011 First-Year Player Draft and will become the first member of his draft class to play in the Major Leagues.
Bauer has sped through the Minor Leagues since beginning his professional career last July. This year, he has struck out 116 batters in 93 innings, and has an ERA of 2.23 in 16 starts between Double-A Mobile and Reno.
"I think we feel that Trevor has progressed, and it's getting time for him to find out how he does against a little better competition," Gibson said. "It has to start sometime, and we've decided this is it."
Bauer has not yet arrived in Atlanta. Gibson said he is expected to join the team Wednesday.
When Bauer does arrive at Turner Field, he will be the subject of much fascination. His eye-popping numbers in the Minor Leagues, high-profile prospect status and unique pregame routine have created plenty of interest as he has moved through the Minor Leagues. With his debut now only days away, Gibson said managing Thursday's hype will be critical.
"My worry is that people put too much expectation on the young kid right now," Gibson said. "It's all a process, you know. This game is a little different, the hitters are a little better, the game's going to be a little faster. All the things that we've worked on starting in Spring Training, he's going to be tested to see how good he is at dealing with them."