.GBM File Extension
File TypeGameboy Map File
What is a GBM file?
File created by Gameboy Map Builder (GBMB), an application that allows users to design maps used in Gameboy games; contains map information such as the width and height of the map in tiles and number of property colors; includes the path to the .GBR tileset file that is used to create the map.
To create a GBM file, you need to first select a tileset. Select, select the size, choose your GBR tileset file, and click . You can then design your map, select , name the file, choose the save location, and click .