Convert gun to dds Online: gun2dds
You can use Tom's Editor to easily convert images from
Gunpaint .GUN to Direct Show Surface
Tom's Editor is a free, online image manipulation and converter program.
Go to Tom's Editor
Gunpaint is an image format with extension GUN.
DDS are files invented by Microsoft to be used in games, mostly as textures. Images can be compressed to save space but the compression methods defined by DDS are all very fast in terms of coding and decoding.