Lunar Gate is a location in Final Fantasy VIII. It is the facility used by Esthar to shuttle people to the Lunar Base. To launch someone (or presumably something) into space, s/he is placed in a capsule. They then undergo a process called cold sleep, rendering them unconscious for the trip, and are shot out of a cannon-like apparatus into space. They are "thawed" upon arrival at the Lunar Base. The Queen of Cards can also be found here.