This is a Station Rack/Storage Unit designed specifically for the GameCube.
The system is placed on top of the unit, with hookup cables coming out from the back. To the left and right, are holders that can be used for controllers or Game Boy Advance systems.
On the bottom of the unit, there is a small drawer. It can be used for storing more controllers or other accessories, but the space inside is limited so you'll need to be a little creative if you want to store your stuff inside.
On the top, behind the system and between the controllers, are eight slots. These are for storing Game Boy games. As I prefer storing my Game Boy games in their original boxes, I use these slots mainly for easy access to my Memory Cards.
If a Game Boy Player is attached to the GameCube, it'll still fit inside and the dust cover is still able to close all the way.