Convert pnm to gig Online: pnm2gig

You can use Tom's Editor to easily convert images from
Portable aNy Map .PNM to Gigapaint Multicolor .GIG.
Tom's Editor is a free, online image manipulation and converter program.

Go to Tom's Editor

PNM

PNM images are uncompressed 24 bit RGB images. Can cannot store Alpha channel. PNM images come in 2 types: binary and text. Especially popular on Linux.

GIG

Gigapaint Multicolor is an image format with extension GIG.