Although the G280 traces its heritage to North American Rockwell, Galaxy Aerospace, and Israel Aerospace Industries (which manufactures the airframe), the super-midsize jet is all Gulfstream, from the design of the wing to the elegantly equipped cabin and the outstanding performance that pilots have come to expect from the Savannah, Georgia manufacturer.
Ultimately, the G280 doesn’t share much with the G200/Galaxy except the size and shape of the fuselage. The engines, wing, empennage, avionics, and systems are all new and improved, and thus the G280 required its own new type certificate.