Unfortunately I don’t have any experience with taxonomies in Genesis, I haven’t been in a situation that required them just yet. Even though it could be something really simple, I still have no idea how they work since I’ve never used them.
I would google it and see if anything is out there specifically for Genesis.
I came across this – http://slash25.com/code/show-taxonomy-description-on-an-archive-page/
this – http://wpsmith.net/?s=taxonomy – Travis has a few tutorials that could be helpful.
and this – http://codex.wordpress.org/Taxonomies
I’m sure there are more tutorials out there.