Quite cool. But I miss the part where you can actually use the objects themselves to store something in. What's your goal here? To have a real usable gc, becuase if so, it should probably allocate outside the Go heap, and directly from the OS? Also the fields should probably be packed:

   Name      string
   Rc        int
   Crc       int
   Color     string
   Buffered  bool
   Children  []*Object
   Freed     bool
   isAcyclic bool

as those seem to have quite a bit of overhead for an object.