
You can do that during Windows setup using the console. In order to force Windows on to a GPT, we have to pre-format the drive prior to Windows installation. Installing Windows on a GPT is a bit tricky because Windows wants to default back to MBR.
GUID Partition Table (GPT) is a boot sector technology poised to replace the venerable Master Boot Record (MBR) principally because MBR has a maximum capacity of 2 TB for a single partition (some single disks have reached 3 TB).

Installing Windows Vista/7 on a GUID Partition Table
