Convert gbr to bmp Online: gbr2bmp
You can use Tom's Editor to easily convert images from
.GBR to Microsoft Windows bitmap .BMP.
Tom's Editor is a free, online image manipulation and converter program.
Go to Tom's Editor
GBR are images that can be used as brushes in GIMP image editor.
Format created by Microsoft for their Windows and OS/2 operating systems. Images can be compressed or not.