GCS Holdings, Inc., together with its subsidiaries, manufactures and sells compound semiconductor wafer and foundry related services in China, the United States, Taiwan, and internationally. It also researches, develops, manufactures, and sells optoelectronics technology products and optical chips, as well as grants royalty rights for intellectual property. In addition, the company engages in the wholesaling and retailing of electronic components; provision of product design, research development, and outsourcing management services; manufacturing and selling of semiconductor discrete devices, as well as photodiodes and avalanche photo diodes for telecommunication systems and data communication networks; and manufacturing, wholesaling, and retailing of telecommunication devices. GCS Holdings, Inc. was founded in 1997 and is based in Grand Cayman, the Cayman Islands.