Yes, does not.
https://forums.macrumors.com/threads/1119312/
2011-03-25 14:04:26.650 TestOpenCL[3187:903]
No GPU support!
2011-03-25 14:04:26.652 TestOpenCL[3187:903] Vendor = Intel
2011-03-25 14:04:26.652 TestOpenCL[3187:903] Device = Intel(R) Core(TM) i5-2415M CPU @ 2.30GHz
2011-03-25 14:04:26.652 TestOpenCL[3187:903] Profile = FULL_PROFILE
2011-03-25 14:04:26.653 TestOpenCL[3187:903] Version = OpenCL 1.0
2011-03-25 14:04:26.653 TestOpenCL[3187:903] Image support = YES
2011-03-25 14:04:26.653 TestOpenCL[3187:903] Compute units = 4
And despite the fact that, the HD 3000 have full hardware acceleration ( MPEG-2-VLD, iDCT, and MC; VC-1-VLD, iMDCT, MC, and LF; AVC-VLD, iMDCT, MC, and LF), i do not now how practically they are supported on the OS Lion ( SnowLeopard)level.
Check yourself, when you play these type of videos, how much the CPU usage is. Why I'm so "obsessed" with this "hardware video acceleration"? Because using her, your temp will drop by 10C-15C at the CPU level. And this for Mac mini is crucial.