The GP-4 is the latest in a series of aircraft designed by George Pereira. It is a high performance, cross-country type plane, designed to extract the most speed from the power available, while keeping building costs within reasonable limits. With two 200 pound people, 75 pounds of baggage and 52 gallons of fuel, the GP-4 will cruise 240 mph for 1200 miles plus reserve. Fuel burn is less than 11 gallons per hour on a typical trip. Airfoil selection and drag reduction were primary considerations. The majority of the construction is of wood with foam and fibreglass used in cowling and fairing areas. Design strength at full gross is 8G's positive and 6G's negative.

This was made possible by using a massive one-piece wing spar. Detailed construction plans are available. They consist of 57 sheets, drawn with the amateur builder in mind, plus step-by-step, photo illustrated, construction manual. The GP-4 aircraft has a manual landing gear retracting system that works very well. However, you can now order a separate set of plans for a brand new designed hydraulic landing gear.