I wrote a bunch of ThreeJS and I see code I wrote in your Goo Engine. You also have the ThreeJS license in your license:
https://github.com/GooTechnologies/goojs/blob/master/COPYING...
https://github.com/GooTechnologies/goojs/blob/master/COPYING...
The code that is ThreeJS derived includes most of the 3D engine classes including:
The main Renderer class (!). As well as the Texture, Camera, RenderTarget, ShaderLib, ShaderBuilder, EventTarget classes. Also the majority of the stuff in the /math, /lights, /pass directories.
GooEngine's renderer (not game engine) was clearly forked from ThreeJS some time ago and diverged (significantly in some places and for the better) but the lineage is clear.
Hail open source! :)