I flew a G200 for five years, the last one delivered. It's a dog. We can't Seletar (WSSL) 6000 feet ISA+10, with 6 pax and 13500lbs of fuel to Maldives (VRMM). We had to use the Changi (WSSS) for the trip. On most days with full fuel, you can only take 1 pax. You are limited by weight for you climb, typical 10000lbs fuel and 6 pax, max FL390. then step climb as you burn fuel. Max duration I have flown the aircraft was from Long Beach to Honolulu, 6.7 hours, 8 pax, 13800lbs fuel. Started at FL340 ended up at FL410 max.