I have no idea if this will work but do any PC emulators support Dexdrive that could open GME and save it back out as a PSV?
If not: I also found this: http://moberg-dybdal.dk/psxge/
Convert game saves between formats (DexDrive, X-Plorer/X-Ploder, Action Replay + other cartridges, PlaySaver, Virtual Game Station, PSEmuPro, Bleem!... Everything you can get your hands on!).
Convert game saves between regions (Europe, USA, Japan).
Again I have no idea, I'm just trying to help.