The Gemini Service Module is used in tandem with the Gemini Capsule to form the complete Gemini spacecraft. Besides the Gemini Capsule, both the LOK Crew Capsule and the LOK Docking Module can be mounted on top of it.

It can also function as a payload as well, and be placed on top of Lunar Module Descent or LK Lander Legs.

This is loved by some players, as there is a bug where there is no hit box for the Gemini Service Module.