The Gilera GP 800 i.e., produced between 2007 and 2009, represents a significant entry into the maxi-scooter segment, blending the practicality of a scooter with the performance and ergonomics typically found in motorcycles. Powered by a robust 799 cc V-twin engine, it delivers impressive horsepower and torque, making it a capable machine for both urban commuting and longer journeys. Notable features include its sporty handling, premium Italian design, and the option of an Anti-lock Braking System (ABS) for enhanced safety. This model stands out with its powerful engine in a scooter platform and a design philosophy aimed at bridging the gap between two-wheeled vehicle categories. This comprehensive workshop service repair manual provides detailed guidance for the Gilera GP 800 i.e. (engine code M340M). It covers full mechanical and electrical repair, diagnostics, and maintenance, encompassing all major systems such as the engine management, fuel system, cooling, lubrication, transmission, brakes, suspension, electrical system, and chassis. The manual includes step-by-step repair procedures, diagnostic flowcharts, troubleshooting guides, and technical specifications with factory-level detail, including torque values and special tool requirements. This resource is invaluable for owners and technicians seeking to maintain and repair the vehicle effectively, ensuring its optimal performance and longevity.