Gulfstream Dispells Rumours About G280 Future Existence There has been a swirling of rumors concerning the Gulfstream G280 Supermidsize jet. As a result Gulfstream is reiterating its full commitment and resources to the G280. Rumors have been going around for a while now regarding the future of the super midsize jet. Whether it concerned pulling the plug on the program or replacing it with an entirely new program. The G280 in fact is split between Gulfstream and Israel Aircraft Industries (IAI). Gulfstream suggests that many of those rumors are being pushed by their competitors.