An analog ground test system for an inflatable crewlock was developed to facilitate deployment and training objectives during NASA Lunar Gateway ground testing and training. The result is called STARGATE, a linearly deploying structure which expands from a collapsed state in order to accomplish the deployment and demonstration objective and is capable of supporting a crew of four individuals, their equipment, and other systems to accomplished crewed testing and operations objectives. This report describes the design criteria in detail, and provides an operations manual, technical information, and design documentation.