I figured it out! It's not a GWS at all! It's a great planes motor.

I remembered that on the package it said dc-3, and that it had a deans plug and long wires on it.
(it says it's a speed 400, but it's actually a 380 can size)
here it is:
http://www3.towerhobbies.com/cgi-bin...?&I=LXGAT9&P=7