After several weeks of regular use, the monitor is still working fine with no known bugs. I realized in re-reading my logs that I never posted the final pinout chart for the monitor cable for connection to an HDMI connector (I've also included info for connecting it to DVI connector, for those who need that). This chart is the heart of the project and it took by far the most work to cobble together and test:

For those of you who have made it this far in the project logs, and who are perhaps contemplating a similar hack on your own G5, please feel free to contact me with questions, either via direct message or in the comments below. Happy hacking!