Call of Duty: Warzone's new Gulag is based on Standoff from Call of Duty: Black Ops 2. Standoff is one of the fourteen original multiplayer maps in the game.
Season 3 introduced a variety of changes to Warzone, including new operators, weapons, and game modes. The latest update also got rid of current-day Verdansk for good and brought in a new map, Verdansk '84.
The latest Warzone map is a completely different version of Verdansk set in 1984. It includes new points of interest, features, and gameplay options. Stadium has been reimagined, the Gora Summit has replaced Dam, and several locations, such as the Verdansk Regional Airport, Karst River Quarry, and Downtown's Broadcast building, received some changes.
Players who dive into Warzone Season 3's Verdansk '84 map may notice that the new Gulag resembles Standoff from Black Ops 2. The map was also featured in Call of Duty Online and Call of Duty: Mobile. According to leaks, it will be introduced to Black Ops Cold War later on in Season 3. The original version of Standoff from Black Ops 2 is set in a town in Kyrgyzstan close to the border with China.