This game means a lot to me and my partner, and I've spent years of my life wanting it finally be put on pc so that it can get the love and care it needs from not just gog, but also from it's fans through a hopeful modding scene. It would also do so much better on a online multiplayer service like GOG Galaxy, where it's multiplayer would be so much smoother than Square's servers.
While yes the gamecube version is playable online through dolphin, it isn't easy and requires a lot of work for both players. So hopefully a gog/pc release would end that headache, and let people play the game together without being savvy with emulation, or having to pay for a rip off online subscription that all the console versions have to deal with.