Tim is right, the pinout for the GC's male DVD drive connector is the same as I've shown here:
If you orient the male connector as the motherboard is depicted above the only difference is that the top two rows of pins and bottom two rows of pins in the above pic are in a straight row. So:
28, 27, 26, 19, 25, 24, 17, 21, 15, 13, 11, 9, 7, 5, 3, 1
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5v, 5v, 5v, 5v, GND, 23, 22, GND, GND, GND, GND, GND, GND, GND, GND, GND