Is it possible to detect gpu model on windows system and also monitor usage?
We do not have any out of the box metrics, but if you find any command line utility that is able to get this data, you can add external metric for that.
You likely can use Windows performance counters. There are quite a lot of them for GPU. I didn't try to collect them from NetXMS, but my Windows notebook seems to provide GPU utilization and GPU memory usage among other stuff, and they should work as any other perf counter using "Windows Performance Counter" source for DCI.
Best regards,
Victor