The Gulfstream GIV is an updated version of the Gulfstream GIII. It was given a 54-inch cabin stretch (allowing for a 6th window on each side), upgraded engines that are more powerful and fuel efficient than their predecessors, and an aerodynamically and structurally improved wing which allows for additional fuel capacity. Upgraded avionics made it the first business jet to have an entire glass cockpit with an advanced EFIS avionics suite and six color CRT displays.
As of September 2017, 93% of Gulfstream GIV aircraft were purchased pre-owned by their current owners, the other 7% new. 10.1% are for sale with the majority of those (72%) under an exclusive broker agreement. When for sale, the average time on the market is 371 days
Design work on the GIV began in early 1983 and the first flight took place on September 19, 1985. The GIV entered into service in 1987 after receiving FAA certification on April 22 of that year. A total of 196 GIV aircraft were manufactured with 179 currently in operation worldwide. It was upgraded to the special purpose GIV-SP version in 1993 and was later re-designated the G400.
There are 179 Gulfstream GIV aircraft in operation today. Most of these are wholly owned (175) with three in shared and one in fractional ownership. 11% are currently leased. North America has the largest percentage of wholly owned Gulfstream GIV aircraft (86%) followed by Asia (7%).