Convert psd to gg Online: psd2gg
You can use Tom's Editor to easily convert images from
.PSD to Koala Painter 2, packed
Tom's Editor is a free, online image manipulation and converter program.
Go to Tom's Editor
PSD is in internal image format of Adobe Photoshop. It can store all the features offered by Photoshop, like layers and paths. Images can be compressed or not.
Koala Painter is a Commodore 64 program do edit images. GG images are packed using RLE compression.