[Someone]

Placed one on the very edge and had the other guy move towards it.

Movement was halted, when they reached the triggering range.

No damage was dealt and the player was not moved about by the wind effect.

Next, placed one in the middle. The other player moved towards it. It triggered as normal.

Regular Gust Traps don't trigger, or Blazing ones. I couldn't test with other types.

Ice and Fire traps also triggered normally on the edge and in the middle.