The Droidnostics Center was an area of Star Tours' Tomorrowland Starport used for droid repair and maintenance, almost entirely staffed by droids themselves. The term "Droidnostics" refers to a droid diagnostics system.
Around the time of the Battle of Death Star III, G2-4T served as the foreman supervising other droids. G2-9T was working on R5-D2 in the center at the time, but was more interested in chatting with guests passing by than doing his work and was scolded for low productivity. The cluttered area was cleaned by janitor droid max-W 100, and was also home to Mouse Droids and Bird Droids.