Gassan Lake City is closed for renovation for 2 months opening in December we believe.
In the meantime Gassan Marina is offering green fee + caddy fee (walking) at 650baht. Or green fee,caddy fee and golf cart for 1000baht.
It is probably 3 years or more since I last played there and it was a mess in general,apart from the flooding.
Worth one visit at those prices just to check it out.
Will post back.