The GLS had a successful competion history that started some 4 years before as it's production as a Holbay powered Hunter and which won the 1968 'London-Sydney Marathon Rally'.

In 1974, a production GLS that was factory run won the 'British Production Saloon Car Championship', and which broke many lap records during the that year.

The GLS is now a very rare car indeed and is much sought after by people who have previously owned one, or know someone that has owned one in the past.

The Hunter GLS as mentioned previously was a mix of other Hunter models. The engine was first used in the Sunbeam Rapier H120, the interior was from the Hunter GL and the dashboard was taken from the Hunter GT. The front of the car is distinguished and easily recognisable by the 4 round 5.25" head lights with chrome surrounds, similar to the Humber Sceptre. All GLS models had Rostyle wheels.

Holbay Racing Engines was founded in the 1950's by the late John Reid who was a master out of making family saloon engines perform like no one could ever imagine. Holbay were asked to see if they could squeeze a bit more power out of the standard Rootes 1725cc engine, and when they did, even the Rootes managment had problems believing the performance figures of 120 BHP. Of all the engines that Holbay produced for the H120 and GLS models not one engine was ever returned to Holbay.