GW is the artificial intelligence controlling the Patriots’ information system in Metal Gear Solid 2: Sons of Liberty.
GW operates from the Arsenal Gear facility and forms part of the Patriots’ network of artificial intelligences. The system filters and controls information, helping the Patriots shape what society receives, believes, and remembers.
The game’s final revelations connect GW to the S3 Plan and to Arsenal Gear’s manipulation of data. The AI is also central to the distortion of the Colonel Campbell interface experienced by Raiden during the later stages of the game.
GW is not the same as JD, one of the higher-level AIs identified in the series’ later mythology. S3 refers to a plan or system concept, while SOP is the battlefield-control system featured in Metal Gear Solid 4.