The Come to the world in Bavaria, but since 1985, grew up in Lower Saxony son of former professional football players and coach Franz Gerber debuted in the 1998/99 season for Hannover 96 in the Bundesliga 2. In winter 1999/ 00 Gerber moved to FC St. Pauli, with whom he set up and in 2003 after 18 months of 2001 in the Bundesliga relegation back to the 2nd Bundesliga. Although the midfielder was replaced that season until the winter break to St. Pauli, he was the best scorer of the hamburger in that season. Seven of his eight goals this season scored Gerber in their last nine games. At St. Pauli in his time in Hanover Gerber's father was already at the same time as his coach.
After the descent Gerber joined the second division 1 FSV Mainz 05, with which he rose for the second time in the Bundesliga in 2004. In the first Mainz Erstligajahr Gerber was the best scorer with seven goals of the team. In the summer of 2005, he was heavily courted by several Bundesliga clubs, including Hertha BSC, but extended his contract with the people of Mainz. In Mainz Gerber finally managed to prevail and got a regular place. After he ran after his long form he had last found again and struggled with his team to avoid relegation in the Bundesliga, but this did not succeed.
In summer 2007, he moved for two years to the Greek first division club OFI Crete. For the season 2009/10 Gerber returned to Germany for FC Ingolstadt 04 in his first season at the FCI, he reached with his team the third place in the third league. In the following second and crucial relegation match against Hansa Rostock he scored both goals in the 2-0 away win and increased with the Ingolstadt engineers after the 1-0 first-leg victory in the 2nd Bundesliga. There, his contract was not renewed in the summer of 2013.