G Whiz: Gulfstream’s G300 Gives Super-Mid Buyers Something to Wait For

Five months after its first flight in Savannah, Gulfstream's G300 super-midsize jet is moving through flight testing, with entry into service targeted for 2027. Assembly runs through Gulfstream's partnership with Israel Aerospace Industries, preserving the manufacturing relationship behind the G280. The G300 will replace the G280 and bring updated range, cabin systems and avionics into a category already crowded with capable machines. Its arrival puts Gulfstream back in sharper contention with the Bombardier Challenger 3500, Cessna Citation Longitude and Embraer Praetor 600. For buyers, that is useful. Aircraft manufacturers tend to become more flexible when a credible alternative is taxiing into view. How the G300 compares The G300 is rated for 3,600 nautical miles and configured for up to 10 passengers, with Gulfstream emphasizing cabin air quality and updated onboard systems as part of the aircraft's broader refresh. On range, the G300 sits squarely in the super-mid conversation. The Challenger 3500 is rated at 3,400 nm. The Citation Longitude comes in at 3,500 nm. The Praetor 600 stretches farther, at 4,018 nm. In other words, the G300 does not redraw the category. It simply gives Gulfstream a fresher horse in a very expensive race. That matters. Buyers comparing aircraft in this class are rarely choosing on range alone. Delivery timing, cabin experience, operating profile, residual value and OEM support all enter the calculation. The G300 gives Gulfstream a fresher answer to those questions. What it does to the segment Buyers shopping for new super-mid aircraft in 2026 now have a Gulfstream alternative roughly a year away. For those with no immediate delivery requirement, that creates leverage. An operator considering a Challenger 3500, Longitude or Praetor 600 can now ask a simple question: Is the better move to take an available aircraft today, or wait for a new Gulfstream delivery position in 2027? The answer will depend on mission needs, pricing, trade terms and tolerance for certification risk. But the question itself changes the negotiation. The G300 also gives competing OEMs a reason to sharpen their pencils. A buyer who can credibly wait is often a buyer with options. G280 trade-in implications The more immediate story may be the G280. Gulfstream launched the aircraft's predecessor program as the G250 in 2008, before renaming it the G280 in 2011. The aircraft entered service in 2012, which means many owners are now well into the natural replacement window. For G280 operators, the G300 offers a clean upgrade path: same OEM, same broad manufacturing lineage, newer systems and a successor-aircraft narrative that will be easy for Gulfstream to sell. That does not mean G280 values fall off a cliff. Markets are rarely that tidy. But the G300 does start the clock. Operators should watch two things over the next 12 to 18 months: whether Gulfstream holds its 2027 entry-into-service target, and whether G280 asking prices begin to soften relative to the broader super-mid pre-owned market. If the G300 stays on schedule, trade-in activity could put more G280 inventory into play. If certification timing moves to the right, hardly a novel event in aircraft development, late-model G280s may enjoy more support from buyers who need an aircraft sooner. Buyer synopsis The G300 is not a category killer. It is something more practical: a modern Gulfstream entry in a super-mid market where timing and negotiating leverage matter. For buyers who need an aircraft in 2026, the G300 gives them another comparison point when evaluating the Challenger 3500, Citation Longitude, Praetor 600 or a late-model G280. For buyers with flexibility, the decision becomes whether a 2027 delivery slot is worth the wait. For G280 owners considering a sale or trade, the next 12 to 18 months deserve close attention. Even though this aircraft has not entered service yet, in the aircraft markets, anticipation has a value of its own. Browse current super-midsize jet listings on GlobalAir.com.