The Ginetta GT5 Challenge, currently known as the Protyre Motorsport Ginetta GT5 Challenge for sponsorship reasons (it has also been previously known as the Ginetta 20 Challenge), is a one-make racing series based in the United Kingdom.

The cars use a sealed Ford Zetec 1.8-litre engine and tubular steel chassis, full integral FIA approved roll cage and fibreglass shell which ensures safe, controlled racing.

Highlights from every round will usually be shown on Motors TV.

The 2012 Total Quartz Ginetta GT5 Challenge rounds took place on the UK’s high-profile circuits, which include Brands Hatch, Donington Park, Oulton Park, Snetterton Motor Racing Circuit, Rockingham Motor Speedway, Silverstone Circuit and Cadwell Park.

All weekends were triple headers, thus providing 21 races throughout the season, with all races counting towards the final championship positions.