Assassin's Creed on GameCube? No — Released After GC Lifespan

Assassin's Creed (2007) never came to GameCube. The GC was discontinued in 2007; the game launched on PS3, Xbox 360, and PC. Ubisoft skipped the platform entirely.

For Nintendo platforms, the series debuted on Wii U (Assassin's Creed III, IV: Black Flag) and later on Switch (The Ezio Collection, Rebel Collection).