Friend of mine flew with Gulfstream over Syria 2 years ago. He sent me a picture of PFD. If I'll find it I can post it here.
The de-icing system is a little strange for this jet category. But it's still better system than Hawker's fluid system and a bucket of the fluid in the baggage compartment.
The G150's performance is great and It can fly non-stop Europe-America as a private flight. Steep approaches and short rwy requirements makes it the best choice in its category.
We'll see if we choosed right one. But we paid a lot for analysis and this seems to be the best choice indeed.