At the start of the GII program, Grumman officials separated the company's civil and military aircraft production to improve efficiency.

In 1966, they relocated the civilian component to Savannah, Georgia where they had found a supply of skilled labor, an airfield adjacent to the plant and room for expansion.

Transportation facilities suitable for heavy equipment and machinery as well as weather favorable to year-round flight-testing and flight-training operations enhanced Savannah's appeal.

[citation needed] On January 2, 1973, Grumman merged its civil aircraft operations with light-aircraft manufacturer American Aviation Corporation.

One year later, the Gulfstream line and the Savannah plant were sold to American Jet Industries, which was headed by entrepreneur Allen Paulson.

[1] The Hustler 400 was a corporate aircraft that featured a propeller in front for short runway use, and a jet in back for high-altitude cruising.

It completed the Gulfstream V Integration Test Facility and rolled out the GV – the first ultra-long range business jet – in 1995.

Within a few months of the GV's first delivery in June 1997, it set nearly 40 city-pair and/or speed and distance records, and its development team was awarded the 1997 Robert J. Collier Trophy, the highest honor in aeronautics or astronautics in North America.

[4] In 1998, Gulfstream purchased K-C Aviation from Kimberly-Clark Corp. for $250 million, which had operations in Dallas, Appleton, Wisconsin, and Westfield, Massachusetts.

[6] In 1999, General Dynamics purchased Gulfstream,[7] and it opened a $5.5 million aircraft refurbishment and completions support facility in Savannah in 2000.

[1] Also in 2001, Gulfstream purchased four U.S. maintenance facilities in Dallas, Las Vegas, Minneapolis, and West Palm Beach, Florida.

The aircraft also contained the first cockpit to incorporate PlaneView®, an integrated avionics suite featuring four 14-inch (36 cm) liquid crystal displays in landscape format.

In 2005, Gulfstream began to offer an in-flight internet connection – its Broad Band Multi-Link (BBML) system.

Gulfstream also designed and developed a means of reducing the sonic boom caused by an aircraft "breaking" the sound barrier – the Quiet Spike.

[1] The Quiet Spike is a telescopic nose device that softens the effect of the sonic boom by smoothing the pressure wave created by flying at the speed of sound.

To meet the immediate need for engineering office space, Gulfstream opened a Research and Development Center (RDC).

The following month, the company signed a nine-year lease with North Point Real Estate for a second Research and Development Center.

The G650 offered the longest range, fastest speed, largest cabin and most advanced cockpit in the Gulfstream fleet.

[12] The G650 became airborne briefly at a high angle of attack before its right wingtip hit the runway, then slid on the ground and caught fire.

[13][14] The National Transportation Safety Board (NTSB) determined the probable cause of the crash was an aerodynamic stall of the aircraft due to a failure to properly develop and validate takeoff speeds, persistent and increasingly aggressive attempts to achieve a V2 speed that was too low and an inadequate investigation of previous uncommanded roll events.

This cleared the way for the company to begin interior completions of the ultra-large-cabin, ultra-long-range business jet in preparation for customer deliveries in the second quarter of 2012, as originally planned.

As of late 2012 there were indications that Gulfstream was close to announcing the design of a quiet supersonic business jet,[16] first drawings of which appeared in December 2012.

; Appleton, Wisconsin; Brunswick, Georgia; Dallas; Las Vegas; Westfield, Massachusetts; West Palm Beach, Florida; Van Nuys and Lincoln, California in the US; London, UK; Mexicali, Mexico, and Sorocaba, Brazil; [18][when?]

[24] On 28 March, 2023, Gulfstream opened a 12,000 sq ft (1,100 m2) sales and design center in Beverly Hills, housing mock ups for the G400, G700 and G800 cabins.