Possible for "Hungry Ghosts" to gain path? Possible to help them out?

Is it possible for states/beings of that of hungry ghosts to gain path? Is it possible to help them? Or is providing food, in the case they had done merits before, all what one could do for them in their state? For context and understanding, see also: [Escape possible for internets “hungry ghost”?](https://buddhism.stackexchange.com/questions/31148/escape-possible-for-internets-hungry-ghost) and [What are the hungry ghosts or hungry shades really?](https://buddhism.stackexchange.com/a/22380/14871)