The site consists of five essentially identical rooms, connected by acceleration gates. Each room contains the same numbers and types of NPCs, give or take -- 10 each of frigates, battlecruisers and battleships. All enemies aggress on warpin.
In addition to the standard NPCs, the third room contains a dread guristas cruiser, the fourth room contains a dread guristas battleship, and the 5th room contains a "dread guristas commanding officer" and a stasis tower. The dread guristas commanding officer is an overseer rather than a faction spawn, and drops 20th tier overseer effects worth 61 million. Presumably he can also drop deadspace loot (probably pith c-type) and dread guristas loot, though he didn't do so on my first run.
- NOTE: GMOC contains no elite cruisers or elite frigates, so target jamming is minimal.
- NOTE: The overseer has a moderate tank of around 3-400 DPS, a large buffer and is immune to electronic warfare including target painters.