Question: how to gpt partition in windows 10?
Answer: Connect a USB Windows 10 UEFI install key.
Boot the system into the BIOS (for example, using F2 or the Delete key)
Locate the Boot Options Menu.
Set Launch CSM to Enabled. ... 
Set Boot Device Control to UEFI Only.
Set Boot from Storage Devices to UEFI driver first.
Save your changes and restart the system.