There are over 1,000 cars available in Gran Turismo 5 for the PS3. Some are given to you by default, some you have to purchase, and some are unlocked by winning specific events, etc.
This is the list of cars unlocked by getting  certain medals during the license tests.
Check out my other guide if you’re looking for the full list of unlockable cars in Gran Turismo 5.
Note that (S) stands for Standard and (P) stands for Premium.
B License Test
Bronze – Mazda Demio Sport ’03 (S)
Silver – Daihatsu OFC-1 Concept ’07 (P)
Gold – TommyKaira ZZ-S ’00 (S)
A License Test
Bronze – Nissan mm-R Cup Car ’01 (S)
Silver – Mazda Atenza Concept ’01 (S)
Gold – Isuzu 4200R Concept ’89 (P)
IC License Test
Bronze – Acura DN-X Concept ’02 (S)
Silver – Autobacs Garaiya ’02 (S)
Gold – Nissan GT-R Concept ’01 (S)
IB License Test
Bronze – Mazda Eunos Roadster J-Limited ’91 (P)
Silver – Mitsubishi HSR-II Concept ’89 (S)
Gold – Honda S800 RSC Race Car ’68 (S)
IA License Test
Bronze –Â Dodge RAM 1500 Laramie Hemi Quad Cab ’04 (S)
Silver – Land Rover Range Stormer Concept ’04 (S)
Gold – Ford GT ’05 (S)
S License Test
Bronze – Opera Honda S2000 ’04 (P)
Silver – Mazda MX-Crossport Concept ’05 (P)
Gold – Nissan GT-R Spec-V GT Academy Version ’09 (P)