The chassis was designed by Rory Byrne, Ignazio Lunetta, Aldo Costa, Marco Fainello, Nikolas Tombazis and James Allison with Ross Brawn playing a vital role in leading the production of the car as the team's Technical Director and Paolo Martinelli assisted by Giles Simon leading the engine design and operations.

[5] Its development was based on the previous Ferrari F2002, but featured new bulbous sidepods and a lengthened wheelbase to aid aerodynamics.

The car was designated "GA" as a mark of respect to Gianni Agnelli, the recently deceased head of Fiat.

As a result, Williams and McLaren were able to mount a consistent challenge to Ferrari and push Michael Schumacher for the championship.

[9] Ferrari became competitive again as it won the final 3 races of the season, and were able to hold off both Williams and McLaren for the Constructors' Championship, whilst Schumacher snatched his sixth Drivers' title, breaking Juan Manuel Fangio's record which had stood for 46 years.