The Gorgon has an action for "Petrifying Breath" that causes petrification if recipient fails two con saves.
My question is whether or not this weapon is a "poison" so that the Paladin Lay On Hands could end the petrification or if only Greater Restoration or Wish can do it.
The Monster Manual states:
The gorgon exhales petrifying gas in a 30-foot cone. Each creature in that area must succeed on a DC 13 Constitution saving throw. On a failed save, a target begins to turn to stone and is restrained. The restrained target must repeat the saving throw at the end of its next turn. On a success, the effect ends on the target. On a failure, the target is petrified until freed by the greater restoration spell or other magic.