Well, he's fine in that his heart hasn't collapsed into a dark empty void of endless hunger and pain. He is definitely not fine otherwise-- Zangetsu can tell that those parts of Gon that were in the clones he destroyed are gone. Souls can recover, regenerate, just like tissue. But it takes time.

He looks at Yuya and nods.

"I can, as long as you can pick up his back end so it doesn't drag."

Zangetsu crouches in front of Gongenzaka and pulls the arms on his human torso around his neck and shoulders. The iron shackles burn Zangetsu's skin a bit, just a bit stingy. Then, he grabs Gon's taur forelegs under his armpits and wraps them around his middle, holding them tightly around the wrists.

"Gon, I'm gonna need ya to hold on to my neck as best ya can. Yuya, grab his back legs and let's go."