"This market is in danger of de-listing due to low trade volume and lack of user interest. It may be removed on Friday, January 27th 2017 unless the average daily trade volume for the last 14 days exceeds 0.5 BTC."
https://bittrex.com/Market/Index?MarketName=BTC-GP

Looks like we need some more volume at Bittrex guys!

I've begun working on the code base this last week, with the intent of bringing it up to date along the lines of Blackcoin.  Feel free to follow progress here: https://github.com/Settlings/GoldPieces.  I'm trying to get in contact with inkha soon as well... hopefully together we can get GP implemented into some games!