I’m back from vacation and all rested up to deal with all the work I missed and some new ideas for DynamicAccounting.net. But first, Microsoft has put together a list of all the patch releases (hot fixes, service packs, etc.) for Dynamics GP 9.0. You’ll need Customersource access but the list is here.
GP 9 Patch Releases
Archived post from 2006. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps.