Just in case you missed the pre-Christmas announcement, I've released my Excel based Table Reference and the even more complete Table and Field Reference for Dynamics GP 2013.
You can view the table reference on-line at this link.
You can download the whole table and field reference from this link.
Thanks to David Musgrave. His post on Getting Table and Field Data out of Dexterity Dictionaries helps save a ton of time when building these for each version.