I've recently installed your latest Intel GPA monitor tool 2013 R4 on my PC.
The platform is: Windows 8.1 Pro x64 - Pentium G3420 - iGPU GT1 (Haswell) - Driver version latest 3345 - No discrete card.
In the "About" menu of Intel GPA Monitor 2013 R4, it recognizes my Intel HD graphics and OS and says "Supports GPA Instrumentation"
But when I try to use the HUD with Media Performance metrics, like "MFX decode usage", or "VPP DXVA2" etc, none of them shows a value during HW accelerated video playback. Only the built-in FPS counter of HUD works.