GPT vs. MBR

[Артур Истомин]

I'm now in a upgrading process to OpenBSD 5.8 (backup etc.). I have laptop
with EFI(UEFI) capability and 500GB HDD. There are any benefits from GPT 
with my configuration to migrate from MBR to GPT (I'm also using full disk 
oencryption)?

Thanks.