Bitcoin Gold is a new hard fork planned by Jack Liao (CEO of LightningASIC), that will happen on October 25. It's main aim is to decentralize mining by changing the Proof-of-Work algorithm to ZCash's Equihash algorithm, and they promise it'll switch to a different PoW when ASICs are launched.
Although they don't have anIts addresses will start with G
(P2PKH) or A
(P2SH), and it has replay protection. Source
The official website, these is bitcoingold.org
Also These can be used to contact them:
UPDATE: http://btcgpu.org is the only official website.