GBM (Generalised Bitmap Module) is a library for handling many different bitmap file formats. It is used by many OS/2 applications like Mesa, PM-Raw, PM-Exif. GBMV2 is a PM bitmap viewer and editor that uses GBM.DLL.

The source code is freely available and released as Public Domain. There are some Open Source libraries used (source code included) that have their

own license (libpng 1.2.8, zlib 1.2.3, libtiff 3.7.3, IJG JPEG 6b). Please be aware of this when modifying or redistributing the sources.