have gdisk available in mer-tools repository
there's fdisk, cfdisk, sfdisk, and parted available from mer-tools...
but, the mmcblk0 device is actually GPT table, and the parted doesn't actually work well with GPT tables...
a parted rebuild with working GPT support would be nice, but maybe gdisk is better suited for the task.
(i'll note that the git repos i found for parted on mer, doesn't actually contain commits... it seems some repositories aren't actually synced from old yet?)
on mer, i found a howto for adding new packages, so i'm gonna go and try this out for gdisk...