The Warding Gesture is not a spell-like or a spell ability, and while I am not sure what the intended effect of Dominate Gaze (of vampires) is, I believe it is not either.
But spellcraft adds to the saves of both. Given how the DCs of these abilities are quite low as well, I think it shouldn't.
How to recreate: Use Warding Gesture against the intended target, or Dominate Gaze, and check their willsave to see if it's applying Spellcraft or not.
