You must dump it from your own physical GameCube console. This is legal under fair use / backup provisions in some jurisdictions, provided you don’t share the file.
Unknown files from untrusted sources are a prime vector for malware. Cybercriminals know that ipl.bin is a niche but necessary file. They package fake "BIOS packs" with trojans, keyloggers, or ransomware. You might download a file named gamecube_ipl.bin.zip only to find it contains an executable (.exe) or a script that compromises your system. Always be suspicious of small, single-file downloads from unverified forums. gamecube ipl.bin download
If you ignore the legal advice and search for a "gamecube ipl.bin download" on forums, torrent sites, or file lockers, you expose yourself to several risks: You must dump it from your own physical GameCube console