The GA-43 was a conventional low-wing cantilever monoplane of all-metal construction. The prototype had fixed tailwheel undercarriage, but the main units of this were later changed to be made retractable, and three of the four production examples also had retractable mainwheels, the fourth aircraft having twin pontoons instead. The oval-section fuselage contained a ten-seat passenger cabin, and the cockpit was located atop the fuselage under a separate canopy.