Convert gig to pnm Online: gig2pnm

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

Go to Tom's Editor

GIG

Gigapaint Multicolor is an image format with extension GIG.

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.