Gulfstream unveils new super-midsize G300news by Mike Stones September 30, 2025 Print this pageGulfstream Aerospace has revealed its new, super-midsize Gulfstream G300 as the latest addition to its next-generation fleet. Replacing the G280, the new G300 features the manufacturer’s panoramic oval windows and new Harmony Flight Deck, which includes next-generation avionics designed to enhance safety and operational efficiency. The G300 Harmony Flight Deck includes six touch screens, paired with Phase-of-Flight intelligence designed to deliver intuitive technology to pilots. The G300 is powered by high-thrust Honeywell engines, coupled with the clean, swept Gulfstream wing to support fuel-efficiency, says the OEM. Gulfstream G300 – at a glance