You're sure it's Catoblepas? That was an Ethiopian creature, albeit adopted like Sphinx, Manticore or Phoenix.
I'm actually pretty sure D&D Gorgon is just a fancy name for Bronze, Brass and Steel Bulls or Khalkotauroi.
Actually, even Wiki article links to it. Aside being species of Medusa (like in original) I also seen them serving as version of Minotaur, that was on Xeen.