How to encrypt GPT system disk on Windows 8.1?

Question

TrueCrypt

Colleagues, tell me please, who solved a similar task of encrypting the GPT system partition?
The TrueCrypt project closed without realizing this feature.
Well mind comes only Bitlocker. Maybe someone else can suggest something else?
Maybe there is a way out somehow without losing data to convert GPT to MBR and still use TrueCrypt?

Answer 1

Paragon Hard Disk Manager 12 perfectly performs the function of converting GPT to MBR and vice versa without data loss, I myself convert it to Live CD.