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X-Plane 9+ Gulfstream G250. In 2005, Gulfstream and IAI began designing a follow-on aircraft to the Gulfstream G200. The new model, named G250, was launched in 2008. Planned improvements included new glass cockpit and engines, larger wing, and heated leading edges. The G250 took its maiden flight on December 11, 2009. In July 2011, the G250 was renamed the G280 as the company had "determined that G280 is a more amenable number sequence (than G250) in certain cultures.' It received full certification on September 4, 2012. By Larry Cole.