Boot from GPT formated disk? (no replies)

Hi

I installed the new uboot on my GoFlex net and would like to boot from a USB hdd which is GPT and not MBR formated. In addition, the rootfs labeled partition is partition 5.

How can I boot from this rootfs?

I read somewhere here about booting from UEFI, but I can't find it anymore?

Just booting the GoFlex does not work.

Any suggestions?

Thanks,

Rainer