Raymond
I did get it to work. This issue was my problem and not actually a problem with the A203 v2 board or the seeed studio drivers.
I am working in C (C++) and I was using the JetsonGPIO library (https://github.com/pjueon/JetsonGPIO), which turns out only works on the dev carrier board. When I switched to using JETGPIO library (https://github.com/Rubberazer/JETGPIO), I was able to use the GPIO pins of the A203 carrier board.
For me, this issue is resolved.
GB