Both the Glastron GS 259 2008 and the Glastron GT 180 2009 are deep-V designs, both built in fibreglass, so the buying decision usually comes down to a handful of practical questions: how many people are you putting on the water, how far do you trailer, and what does your tow vehicle weigh?
Size is the most obvious dividing line here. The Glastron GS 259 2008 measures 24,0 feet overall (2008), giving it roughly 7,0 additional feet of deck space compared to the Glastron GT 180 2009 at 17,0 feet (2009). Weight tells a clearer story for trailering families: the Glastron GS 259 2008 tips the scales at 5 525 lbs - 4 025 lbs more than the Glastron GT 180 2009 at 1 500 lbs. That difference is meaningful if you're working within a half-ton or three-quarter-ton truck's tow rating, especially once you factor in a motor, gear, and fuel.
The Glastron GS 259 2008 carries a rated maximum of 320 hp. Engine data for the Glastron GT 180 2009 wasn't available in our records - check the manufacturer's spec sheet before sizing a motor.Fuel capacity breaks the other way: the Glastron GS 259 2008 carries 56 gallons versus 23 gallons in the Glastron GT 180 2009. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.
For family outings this is probably the sharpest distinction between the two. The Glastron GT 180 2009 is rated for 8 passengers, while the Glastron GS 259 2008 caps at 7. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Glastron GT 180 2009 could be the deciding factor.
Bottom line: Choose the Glastron GT 180 2009 if your priority is putting more people on the water - it handles 8 passengers and at 17,0 ft it has the deck room to back that rating up comfortably. The Glastron GS 259 2008 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 7 that costs less to run day-to-day.