The GMA950 kext does not exist in the GM..
s-Mac-Pro:Extensions$ ls AppleIntel
AppleIntelCPUPowerManagement.kext/
AppleIntelCPUPowerManagementClient.kext/
AppleIntelFramebufferCapri.kext/
AppleIntelHD3000Graphics.kext/
AppleIntelHD3000GraphicsGA.plugin/
AppleIntelHD3000GraphicsGLDriver.bundle/
AppleIntelHD3000GraphicsVADriver.bundle/
AppleIntelHD4000Graphics.kext/
AppleIntelHD4000GraphicsGA.plugin/
AppleIntelHD4000GraphicsGLDriver.bundle/
AppleIntelHD4000GraphicsVADriver.bundle/
AppleIntelHDGraphics.kext/
AppleIntelHDGraphicsFB.kext/
AppleIntelHDGraphicsGA.plugin/
AppleIntelHDGraphicsGLDriver.bundle/
AppleIntelHDGraphicsVADriver.bundle/
AppleIntelIVBVA.bundle/
AppleIntelSNBGraphicsFB.kext/
AppleIntelSNBVA.bundle/