The source conf for clearfrog appears absent of GPT support albeit there should not be space concern for that target, if that is the reason.

Owning such device I took me some effort and time to figure out why the device would not boot from a GPT partition but only from legacy MBR. Thus I would appreciate if GPT support could be implement for this target. As far as I can comprehend from the source code it would require

+ CONFIG_CMD_GPT + CONFIG_PARTITION_UUIDS

but maybe there is more?