I agree with Jim:
When you are doing clean install of Win 10 to new HDD/SSD or delete all existing partitions on used disk (item 4 in Jim's picture) and continue to install (item 5) used partition style (MBR / GPT) is selected depending on are you boot your install media in Legacy or UEFI mode.
On both cases installation process first create necessary system partitions on correct format and the rest of the disk will be formatted to NTSF for Windows 10.
There is also new tool on Windows 10 1703 or later that can be use to convert running system disk from MBR to GPT without losing any data.
More details: MBR2GPT.EXE
It is never waist of time to read and learn new things to keep your knowledge updated!