Ciao,
Credo che quello che vuoi fare tu, non sia possibile al momento.
Ti posto un estratto del documento relativo al "what's new Tech vSphere 5.1"
Hardware-Accelerated 3D Graphics Support
With vSphere 5.1, VMware has partnered with NVIDIA to provide hardware-based vGPU support inside the virtual machine. vGPUs improve the graphics capabilities of a virtual machine by off-loading graphic-intensive workloads to a physical GPU installed on the vSphere host. In vSphere 5.1, the new vGPU support targets View environments that run graphic-intensive workloads such as graphic design and medical imaging.
Hardware-based vGPU support in vSphere 5.1 is limited to View environments running on vSphere hosts with supported NVIDIA GPU cards (refer to the VMware Compatibility Guide for details on supported GPU adapters). In addition, the initial release of vGPU is supported only with desktop virtual machines running Microsoft Windows 7 or 8. Refer to the View documentation for more information on the vGPU capabilities of vSphere 5.1.
NOTE: vGPU support is enabled in vSphere 5.1, but the ability to leverage this feature is dependent on a future release of View. Refer to the View documentation for information on when this feature will be available.
Ciao