Read-only memory (ROM) file containing Game Boy game data; contains an exact copy of the data from a Nintendo Game Boy cartridge; can be played on a Mac or PC using Game Boy emulation software.
Program(s) that open gb files
Mac: Visual Boy Advance; Boycott Advance Windows: Visual Boy Advance; Basic Boy; BGB; TGB Dual; KiGB; gnuboy
Information from FileInfo.com - The File Extensions Resource.
http://www.fileinfo.com/extension/gb
