Literally, it is Gold Coin Chicken. But there is really no chicken in it. It is pieces of pork lard (肥豬肉), pork liver (豬肝), Char Siu (barbecued meat, 叉燒) stacked together and roasted like 叉燒. The lard added flavour and juice to the relatively dry meat. Quite tasty and worth a try. Throw away the lard if you are health conscious.
It was common at 燒臘店. But it is quite rare these days. I found these at a 燒臘店 in Hung Hom.