Mario Kart Wii CTGP-R v1.0.3 on Dolphin "The disk drive appears to have stalled"

[Qaazavaca Qaanic]

I’m trying to make an ISO converter using CTT and Wiimm’s custom tracks.
Does anyone know how to convert GCT files to raw Gecko/AR codes or include a GCT patcher built-in to my converter? Usbloader supports GCT, but it’s an extra step, and it should not be dependent on a special feature of the USBLoader.
Also, procrastination. It’s around 11:30 PM here, and I’m stuck on homework.