Gulfstream IV

Gulfstream IV
Gulfstream IV. Photo: NOAA; http://www.photolib.noaa.gov/aboutc.html, Public domain, via Wikimedia Commons
Make	Gulfstream
Model	Gulfstream IV
Type	Business jet
Country	United States
First flight	September 19, 1985
Built	1985–2018
Status	In service
Number built	900+
Registered in the US	613 (FAA register, October 30, 2026)
Developed from	Gulfstream III
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The Gulfstream IV (G-IV or GIV) and its derivatives are a family of twinjets, mainly for private and business use, designed and built by Gulfstream Aerospace of Savannah, Georgia, from 1985 to 2018, with two Rolls-Royce Tay turbofans. More than 900 GIV, GIV-SP and G450 jets were built; the last G450 was delivered on January 19, 2018, ending a 30-year run.^[1] In the U.S. there are 613 with a valid registration.^[2]

History

Gulfstream and Grumman began work on the GIV in March 1983 as a re-engined, stretched version of the Gulfstream III. It first flew on September 19, 1985, and the FAA certified it on April 22, 1987. It became the GIV-SP in 1993, later called the G400, and was followed by the G350 and G450. Redesigning the wing structure to save weight also let Gulfstream reshape the wing to cut cruise drag and add range.^[1]

Hurricane hunter

The National Oceanic and Atmospheric Administration (NOAA) flies a modified GIV-SP (N49RF) at 45,000 ft around tropical cyclones, dropping instruments called dropsondes that measure wind, pressure, humidity and temperature on the way down, to help the National Hurricane Center's forecasts.^[1]

The U.S. military flies it as the C-20F, G, H and J.^[1]

Registered in the United States

The FAA register lists 613 of these airplanes with a valid U.S. registration. Here they are by the model name the FAA uses.^[2]

FAA model name	Registered
G-IV	354
GIV-X (G450)	232
GIV-X	9
G-IV (G400)	8
GIV-X (G350)	6
G-IV (G350)	2
G-IV (G300)	2

Owner and mechanic notes: coming soon. What to check before you buy, common problems and what they cost to fix. Airplane Wiki is gathering this from owners and mechanics.

Photos

Gulfstream IV-SP Cargo Layout. Photo: see the file page on Commons, Public domain
Gulfstream IV used by Mercy Jets for transporting patients. Photo: Jdflyer, CC BY 3.0
NOAA Gulfstream IV (N49RF) and WP-3 Hurricane Hunter (N34RF). Photo: NOAA Photo Library, Public domain
Gulfstream IV. Photo: Maarten Visser from Capelle aan den IJssel, Nederland, CC BY-SA 2.0
The Gulfstream IV of the Royal Netherlands Airforce. Photo: Ministerie van Defensie/Arnoud Schoor, CC BY-SA 4.0
Gulfstream IV. Photo: 航空自衛隊, CC BY 4.0
Pakistan Air Force's Gulfstream IV for President and Prime Minister of Pakistan disposal. Photo: THEunique, CC BY-SA 4.0

All photos are from Wikimedia Commons; click a photo for its full credit and license.

Buying a Gulfstream IV

For sale listings: coming soon. Airplane Wiki will list Gulfstream IVs for sale here, with the facts on this page beside every listing.

Sources

↑ ^1.0 ^1.1 ^1.2 ^1.3 Wikipedia, "Gulfstream IV", read November 1, 2026. Airplane Wiki's text is written in its own words; facts are checked against this article and its sources.
↑ ^2.0 ^2.1 Federal Aviation Administration, Releasable Aircraft Database, file dated October 30, 2026. Valid registrations of fixed-wing airplanes whose FAA maker and model names belong to this family. Airplane Wiki uses only counts from this file, never owner names or addresses.

[wp-1] 1.0 ^1.1 ^1.2 ^1.3 Wikipedia, "Gulfstream IV", read November 1, 2026. Airplane Wiki's text is written in its own words; facts are checked against this article and its sources.

[faa-2] 2.0 ^2.1 Federal Aviation Administration, Releasable Aircraft Database, file dated October 30, 2026. Valid registrations of fixed-wing airplanes whose FAA maker and model names belong to this family. Airplane Wiki uses only counts from this file, never owner names or addresses.

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