Nullstone Gargoyle

• WWizards of the Coast2005-10-01
  Official Ruling
  If another spell is cast in response to the first spell, Nullstone Gargoyle doesn’t affect that second spell.
• WWizards of the Coast2005-10-01
  Official Ruling
  Nullstone Gargoyle cares about the first noncreature spell cast during a turn, not the first one it “sees.” If a noncreature spell was cast before Nullstone Gargoyle entered the battlefield, it won’t counter the next one.

Rulings via Scryfall