Hello Tosh Mackins,
Welcome to Microsoft Community and we regret the inconvenience caused to you.
If you mean the temperature beside GPU in the Performance from Task Manager... On some computers (for example my working machine and VMs) there is no GPU temperature because the graphic card's driver does not provide it, so it's true that it's not a hardware issue but still a driver issue. In our case I guess it's because the graphic card driver does not tell Task Manager how to trigger a real-time temperature to be sent. The thing we can do so far I can think, is to check if there is any new driver from the manufacturer and then install it.
Best Regards,
Lenka | Microsoft Community Support Specialist