To unlock gallery you must complete Arcade Mode, Championship Mode & Great Driver Challenge Mode.

Gallery	How to unlock
F355 Extra Colour	Complete on Hard Mode in Championship.
F355 F1 Catalogue	Beat the record on Fiorano.
Movie 1	Complete on Driving Mode in Arcade.
Movie 2	Finish in 1st Place on Sepang.
Movie 3	Complete on Race Mode in Arcade.
Movie 4	Complete the Championship Mode.
Movie 5	Complete the Great Driver Challenge Mode.
Movie 6	Beat the game.
Photo 1	Beat the record on Motegi.
Photo 10	Beat the record on Sepang.
Photo 11	Finish in 1st Place on Motegi.
Photo 12	Finish in 1st Place on Suzuka Short.
Photo 13	Finish in 1st Place on Monza.
Photo 14	Finish in 1st Place on Sugo.
Photo 15	Finish in 1st Place on Suzuka.
Photo 16	Finish in 1st Place on Long Beach.
Photo 17	Finish in 1st Place on Atlanta.
Photo 18	Finish in 1st Place on Nurburgring.
Photo 19	Finish in 1st Place on Laguna Seca.
Photo 2	Beat the record on Suzuka Short.
Photo 20	Complete on Easy Mode in Championship.
Photo 21	Complete on Medium Mode in Championship.
Photo 22	Get a Great Driver Gold on Motegi.
Photo 23	Get a Great Driver Gold on Suzuka Short.
Photo 24	Get a Great Driver Gold on Monza.
Photo 25	Get a Great Driver Gold on Sugo.
Photo 26	Get a Great Driver Gold on Suzuka.
Photo 27	Get a Great Driver Gold on Long Beach.
Photo 28	Get a Great Driver Gold on Atlanta.
Photo 29	Get a Great Driver Gold on Nurburgring.
Photo 3	Beat the record on Monza.
Photo 30	Get a Great Driver Gold on Laguna Seca.
Photo 31	Get a Great Driver Gold on Sepang.
Photo 4	Beat the record on Sugo.
Photo 5	Beat the record on Suzuka.
Photo 6	Beat the record on Long Beach.
Photo 7	Beat the record on Atlanta.
Photo 8	Beat the record on Nurburgring.
Photo 9	Beat the record on Laguna Seca.