Virtual UEFI firmware is not officially supported on VMware Workstation 9.x, but if you want to try it anyway, you can enable it by adding this to your VM's configuration:
firmware = "efi"
That will allow you to install recent Windows (x64 only) onto a GPT disk. There are a few quirks in the EFI bootloader on the Windows installation media: be ready to "Press any key to boot from CD or DVD...", because the installer does not automatically launch on EFI the way that it does on BIOS. Once you have the installer started, though, it should behave much the same as it does on BIOS... it will automatically install the EFI way, using GPT and creating the EFI System Partition and Microsoft Reserved (MSR) Partition, even though those are not shown during installation.
Cheers,
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Darius