Over here you will find free vector brand logos in Illustrator, EPS, Corel Draw format..

Brand Vector Logos start with 'G' letter

Global Benefits Group
Graphic Visual Solutions
Grillo-Werke AG
Grupo Modelo
GNPC
Georgios Oven Fresh Pizza
Galactic Events
Gildan
Global Sport Event Kft.
Gopi
Ganar Salud