Any ideas on how it will perform? Or how I could improve its performance?
Should be excellent
Especially if it really does full HD (1920 x 1080) video at 60P (non interlaced). Actually it might be 50P if it is a UK market model, but that is very good anyway.
You will fill up the 32GB (max) SD card fairly quickly - I guess it will be ~15-20GB per hour at max quality. I am suprised it doesn't support a bigger SD card.
BTW, I did do a test with just suction mounts (no silicone rubber antivibration spacers) but even the smallest amount of vibration messes up the image visibly. One could argue whether leaving the image stabilisation on or off is less bad. Also, single cup mounting causes the camera to move about. 3 cups should do it nicely, but forget about using the front window, which (on an SE aircraft) gets hammered by a very turbulent slipstream.
The GY236 looks interesting. What a daft website - full of Youtube videos and little product info. The image is also quite distorted.