During the off-season, Gerber signed a contract with Atlant Moscow Oblast of the Kontinental Hockey League (KHL), coincidentally the same team that fellow former Senators goaltender Ray Emery played for the previous season before returning to the NHL in 2009. On 13 December 2009, while playing for Atlant, Gerber suffered an apparent fracture of the fourth vertebrae when an opposing forward slid into him. Gerber's neck injury was initially thought to be a compression fracture of a cervical vertebra and it was believed that he would miss upwards of six months. However, after more comprehensive testing the following day, no fractures were found and it was diagnosed as a spinal contusion; he would only be sidelined for a few weeks.