Dr. Gero's Lab (ドクター·ゲロの研究所) is where Dr. Gero took refuge after the defeat of the Red Ribbon Army and where he conducted all of his research on Goku, which led to his creation of the Androids, in the hopes of avenging himself and the army. It is located in one of the Northern Mountains surrounding North City.
It is revealed in Dragon Ball FighterZ that Gero had numerous identical labs, all located in similar looking hard to find areas.
The front door of the primary laboratory is a heavy steel double door, which is very high in resilience. Inside, the Shut Down Remote that disables the Androids in case of a rebellion is placed next to the door. The capsules which contains Android 19, Android 18, and Android 17 are lined up against the wall, while Android 16's capsule lays on the middle of the floor. The lab also contains a basement, where a Super Computer is placed and programmed to finish the creation of Cell.
In a parallel world, the basement supercomputer completed Android 15, Android 14, and Android 13 after Gero's death, whereas they had been destroyed by Gero in the main timeline long before due to being failures.
In the present timeline, the lab is destroyed by Future Trunks in his attempt to prevent Android 18 and Android 17 from activating Android 16, but to no avail. The basement is later destroyed by Future Trunks and Krillin to prevent the completion of Present Cell, with Trunks only delaying destroying it in order to retrieve blueprints of Dr. Gero on Android 17. In the future timeline, Future Android 17 and Future Android 18 destroy the lab after they killed Future Dr. Gero one night, but the basement survives and Future Cell is completed.
The lab is a playable battle stage in the arcade game Dragon Ball Z 2: Super Battle, it is visited in Dragon Ball Z: The Legacy of Goku II, it seen from outside in Dragon Ball Z: Sagas and Dragon Ball Z: Budokai 3, and it appears in cutscenes in the Supersonic Warriors series. In Budokai 3, the lab's doors are seen on the mountain/hill it is built into in the Dragon Universe map are slightly different in that they have the Red Ribbon Army logo on and appear directly on the side of the mountain, whereas the lab is inset in the anime.
In Dragon Ball Fusions, the mountain containing Dr. Gero's Lab is one of several locations that appear inside the Timespace Rift. The mountain containing it appears as one of the floating islands in Area 3F (it floats underneath eastern portion of the floating island that Future West City stands upon). While the lab itself cannot be entered, it is possible to fly into the tunnel leading to the lab's entrance. Occasionally a powerful enemy spawns within said tunnel and if Tekka approaches this enemy, they will be confronted by Android 17 and Android 18, leading to a fight with them, Android 16, Android 44, & Android 55.
- The password to gain access to Dr. Gero's lab was 5201.
- Thunder and Lightning are usually seen around Dr. Gero's lab in anime flashbacks.
- Dr. Brief is one of the few who know the location of Dr. Gero's lab.
- In the anime, Android 17 kills Dr. Gero while the Z Fighters are watching the scene, and soon afterwards Cell's creation is completed. In the movie Dragon Ball Z: Super Android 13!, only Android 18 is seen watching the scene of Gero's death, and then soon Androids 13, 14, and 15 are created.