The IAI-1126 was originally named "Astra Galaxy". Israel Aircraft Industries subsidiary Galaxy Aerospace Inc began designing the Galaxy in the late 1980s in a risk-sharing partnership with the Soviet aircraft design bureau Yakovlev OKB. The program officially launched in September 1993. Yakovlev handled design and manufacturing of the forward fuselage and empennage. However, the Russian company had trouble meeting agreed production schedules, and the partnership was ended in 1995. This led to another risk-sharing agreement, with EADS Sogerma manufacturing the fuselage and empennage, and IAI being responsible for final assembly and other prime contractor duties.

The Galaxy was based on a new wider fuselage, attached to a strengthened Astra SPX wing with integrated winglets and modified high lift devices, powered by new 5,700 lb. (25.3 kN) thrust Pratt & Whitney Canada PW306 turbofans, and with improved Pro Line 4 avionics and all-new interior. The decision to use the existing Astra SPX wing imposed a limit on maximum size, but allowed for a fuselage large enough to accommodate three-abreast seating. The main change from the Astra SPX wing was the introduction of Krueger flaps on the leading edges of the inboard section. These recovered some of the field performance lost as a result of the Galaxy's higher wing loading. It used rubber de-ice boots on wing and horizontal stabilizer leading edges. The aircraft has seating configurations for 8 to 10 passengers. 

The Galaxy first flew on December 25, 1997. By December 1998 it had received certification from the US and Israeli aviation agencies. Deliveries began the following year. The Galaxy was renamed "G200" after Gulfstream Aerospace acquired Galaxy Aerospace in June 2001.

Source: Wikipedia