Designed to make racing affordable for the teams and to make it a better training ground for life in Formula One, GP2 has made it mandatory for all of the teams to use the same chassis, engine and tyre supplier so that true driver ability is reflected. All but three races had taken place as support races at Formula One race weekends to boost the series' profile, to give drivers experience of the Grand Prix environment, and to take advantage of the infrastructure (marshals, medical facilities etc.) in place for a Formula One event. GP2 mainly races on European circuits, but has appearances on other international race tracks as well with their most recent races in the 2012 season at the Sepang International Circuit in Malaysia and the Marina Bay Street Circuit in Singapore.
Many drivers have used GP2 as a stepping stone into Formula One. The 2005 Champion Nico Rosberg was hired by the Williams team for the 2006 F1 campaign, 2006 GP2 winner Lewis Hamilton made the transition to F1 the following year with McLaren and the 2007 Champion Timo Glock to Toyota for the 2008 F1 season. 2009 GP2 champion Nico Hülkenberg moved up to a Williams F1 race drive in the 2010 Formula 1 season. In addition, Heikki Kovalainen (2005), Nelson Piquet Jr. (2006) and Lucas di Grassi (2007)--all runners up--became Renault test drivers the following year. All three earned F1 seats, but have since been replaced.