Guildford Giants were formed in December 2008 and were based at Guildford RUFC. The Giants were initially to participate in the London Merit League, but were given the opportunity to enter the RLC London and South Division after Farnborough Falcons withdrew from the competition. The season included a first ever win against Kent Ravens and ended with a 26 - 24 semi final loss away to Greenwich Admirals.
The 2010 season saw a 2nd place league finish behind Elmbridge Eagles and maiden Grand Final appearance by defeating Southampton Spitfires in the semi final. The grand final was played in Guildford, but ended with the Greenwich Admirals taking home the title.
In 2011 the Giants moved to the brand new Surrey Sports Park where the Men's team finished 5th just missing out on a play off place. A new minis section was launched with teams from Under 7 to Under 11 and a Ladies team which played a friendly against Southampton.