No official announcement of The Sims for the GameCube has been made, though ESRB already had the opportunity to test the game.
In November the also unveiled Red Faction 2 would be heading towards the GameCube by putting its rating on their website.
Does this mean the popular "real life" simulator is being released for the GameCube? It's probably very likely and EA has to confirm the game, and will probably announce it among other titles for the GC.