https://www.facebook.com/gamecomposites/
http://www.aerovfr.com/2015/07/gb-1-le-nouveau-biplace-de-voltige/
http://www.aerobuzz.fr/aviation-generale/article/gamebird-gb-1-nouvel-avion-de
[youtube https://www.youtube.com/watch?v=vPis7mmsboI&w=560&h=315]