Slowly, the gatehouse is cleaned out. Beyond the gatehouse lies a courtyard. The courtyard contains many collapsed pits, which clearly have the long-decayed bodies of orcs in them. It looks like the orcs charged through the gatehouse and made straight for the keep... the path from your present location to there is marked out rather well by the collapsed pits, or, rather, the spaces between them; there isn't ROOM for another pit between the gatehouse and the keep, the orcs seem to have fallen into every single one of those. And kept going, too; the keep's doors are broken.
Going left reveals a medium-size room, containing a winch for the porticullis, as well as six switches. There are stairs leading up, as well as a door leading further into the walls. A few bits of furniture are also present, as well as a few arms racks (empty).
Going right reveals much the same, except there's no winch.