Extrems has just updated the Game Boy Interface software, with 360p support for HD Retrovision SNES cables using PAL GameCube’s (NTSC not compatible). Some examples comparing it to other solutions can be found here: https://www.gc-forever.com/wiki/index.php?title=Game_Boy_Interface/High-Fidelity_Edition#Video_quality
More information can be found here:
https://www.gc-forever.com/forums/viewtopic.php?f=37&t=2782
https://www.gc-forever.com/wiki/index.php?title=Game_Boy_Interface
http://retrorgb.com/gameboyinterface.html
The @HDRetrovision SNES YPbPr Component Cable seem alright with the PAL GameCube, and 360p does work with them now. https://t.co/Ujnh7nbLD7
— Extrems (@Extrems) December 8, 2018