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.

There was a bug in an older version where the GSM was able to clip through YEL's rings when by itself. (This bug seems to be patched already in the latest version)

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