Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:4973633.
I didn't find any gameboy stands that seemed like a proper set... so I made my own! Nothing too fancy, but there's something for all of the consoles. Full disclosure - I haven't tried printing the Light stand as I don't have one. The SP stand is multifunction; you can use it to display the SP open or closed.
I found it best to print them the correct way up. Printing logo down gives a smooth front but I had issues with the overhang (example: gameboy advance). Printing from the back had really "wobbly" results and quite a soft finish to the logo (example: GBA SP).
Depending on your printer, shell and settings, you may need to do some sanding of the inside to make your gameboy fit. Some of the stands are quite snug.