Softmod / Swiss (Homebrew): Use an Action Replay / SD Media Launcher to boot Swiss homebrew app, which can force video mode and launch backups/imports from SD/HDD. Still requires hardware exploit.
Component Cables + Region-Free Patcher: For GameCube backups on Wii (via Nintendont), not original hardware.
Best Legal Option: Buy the PAL version of the game, or play on a Wii (which is also region-locked for GC games unless homebrewed).