Resources is the open-source app aligned with GNOME/GTK for system resource monitoring. Resources has proven to be quite versatile with a nice UI and able to display CPU, GPU, NPU, disk, and other metrics. Out today is Resources 1.9 with the latest capabilities for this app.

Resources 1.9 adds support for reading graphics processor information for Intel GPUs when using the modern Intel Xe kernel graphics driver where as before it only supported using the i915 kernel driver