No, there is no slot for an SD card on the GameCube. This means
that an SD card will not work for the GameCube.
View page
SD cards only work for the wii the gamecube has memory
cards.
View page
I think you can get more memory for your Wii,( you could buy an
SD card for it) but you could get the Gamecube memory card for it
and play Gamecube games, that's all I know.
View page
You can't use an SD Card with an GameCube.
View page
You can use GameCube memory cards, but only to save on GameCube
games, not Wii games. The Wii already has 512 MB of internal
memory, and an optional SD Memory Card can be used to save Wii
games.