When you have a GPU on board, integrated or dedicated, there are some programs that help you get the necessary stats to check its temperature, free memory, and more.
Mission Center is a recommended GUI tool that supports NVIDIA, AMD, and Intel GPUs but may not provide all essential details for Intel GPUs.
For command-line tools, you can use 'nvidia-smi' for NVIDIA GPUs and 'nvtop' for both AMD and NVIDIA GPUs (with proprietary drivers only).
Another option is 'gpustat', a Python package that provides GPU usage details.