GCS Holdings, Inc. manufactures and sells compound semiconductor wafers and provides foundry-related services in China, the United States, Taiwan, and internationally. It also develops, manufactures, and sells optoelectronics technology products and optical chips, and grants royalty rights and licenses for intellectual property. The company wholesales and retails electronic components, offers product design, research and development, and outsourcing management services, and makes semiconductor discrete devices, photodiodes, and avalanche photodiodes for telecommunication systems and data communication networks. It also provides foundry services for RF/wireless and optoelectronics, proprietary optical wafers, and advanced optoelectronics components. Founded in 1997, GCS Holdings, Inc. is based in Grand Cayman, the Cayman Islands.