Bitcoin Gold is a cryptocurrency based on Bitcoin's fundamentals, using GPUs for mining.
Bitcoin Gold was created to reinstate a more decentralized, democratic mining environment that Bitcoin enjoyed in its early days. In context of escalating concerns over Bitcoin mining centralization and corresponding potential network abuse, Bitcoin Gold experiments with a new mining algorithm with the hopes of informing potential future changes to Bitcoin mining. Unlike some forks, Bitcoin Gold doesn't intend to overtake Bitcoin per se, but rather to draw attention to and experiment with possible solutions for enabling retail investors to participate in mining.