| Grigo | W. E. & Co. | 30 King Street | Car 18 H.P. | P 300 | Perth Municipality | 1919 |
| Grigo & Co | W. E. | 30 King Street | Premier 3½ H.P. Motorcycle | P 845 | Perth Municipality | 1919 |
| Grigs | W. E. | 32 Trafalgar Road | Premier 3½ H.P. Motorcycle | P 845 | Perth Municipality | 1917-18 |
| Grilli | G. | 171 Royal Street, East Perth | Chevrolet Truck | 10757 | Metro Hire or Trade | 1927-28 |
| Grilli | L. | 132 James Street, Perth | Ford Wagon | 10762 | Metro Hire or Trade | 1927-28 |
| Grimbey | H. | Meekatharra | Buick | MK ● 51 | Meekatharra Road Board | 1923-24 |
| Grimbley | A. S. | Thomas Street, Subiaco | Bugatti | 6223 | Metro Private Car | 1927-28 |
| Grimbly | A. S. | 106 Roe Street | Buick 4-18 H.P. | P 1199 | Perth Municipality | 1919 |
| Grimbly | A. S. | Meekatharra | Dodge | MK ● 25 | Meekatharra Road Board | 1926-27 |
| Grimbly | K. | Meekatharra | Dodge Wagon | MK ● 59 | Meekatharra Road Board | 1925-26 |
| Grimbly | K. | Meekatharra | Dodge Wagon | MK ● 59 | Meekatharra Road Board | 1926-27 |
| Grimley | G. | Hay Street | - | S 84 | Subiaco Municipality | 1916 |
| Grimshaw | W. | Balfour Street | Ford Truck | K ● 185 | Kalgoorlie Road Board | 1927-28 |
| Grimwood | A. H. | c/o Commercial Bank | 2 Motorcycles | CMC 13 | Collie Municipality | 1915 |
| Grimwood | A. H. | - | 2 motor cycle | CM 13 | Collie Municipality | 1916 |
| Grocock | F. J. | Gnowangerup | Oldsmobile | GN ● 139 | Gnowangerup Road Board | 1927-28 |
| Grogan | A. T. | 17 Alvan Street, Mount Lawley | Overland | 7751 | Metro Private Car | 1925-26 |
| Grogan | A. T. | 17 Alvan Street, Mount Lawley | Overland | 7751 | Metro Private Car | 1926-27 |
| Grogan | Miss E. M. | 40 Queens Crescent, Mount Lawley | Overland | 803 | Metro Private Car | 1927-28 |
| Grogan | T. | Hamilton Street, Bassendean | Thorneycroft Wagon | 10799 | Metro Hire or Trade | 1927-28 |
| Grogan | W. | Holyoake | - | MY ● 13 | Murray Road Board | 1924-25 |
| Grogan | W. | Dwellingup | Chevrolet Charabanc | MY ● 118 | Murray Road Board | 1925-26 |
| Grogan | W. | Dwellingup | Chevrolet | MY ● 13 | Murray Road Board | 1925-26 |
| Grogan | W. | Dwellingup | Chevrolet | MY ● 13 | Murray Road Board | 1926-27 |
| Grogan | W. | Dwellingup | Chevrolet Charabanc | MY ● 21 | Murray Road Board | 1927-28 |
| Grogan | W. | Dwellingup | Buick | MY ● 23 | Murray Road Board | 1927-28 |
| Grogan | W. P. | Dwellingup | Overland 20 H.P. | MY ● 21 | Murray Road Board | 1917-18 |
| Grogan | W. P. | Dwellingup | Overland 20 H.P. | MY 21 | Murray Road Board | 1919 |
| Grogan | W. P. | Dwellingup | Ford | MY ● 21 | Murray Road Board | 1922-23 |
| Grogan | W. P. | Dwellingup | Ford | MY ● 21 | Murray Road Board | 1923-24 |
| Grogan | W. P. | Dwellingup | Ford | MY ● 21 | Murray Road Board | 1924-25 |
| Grogan | W. P. | Dwellingup | Chevrolet | MY ● 21 | Murray Road Board | 1925-26 |
| Grogan | W. P. | Dwellingup | Chevrolet | MY ● 21 | Murray Road Board | 1926-27 |
| Groman | J. A. | Commercial Travellers Club | Ford 20 H.P. | P 619 | Perth Municipality | 1915 |
| Gromann | J. A. | 178 Murray Street | Ford 20 H.P. | P 619 | Perth Municipality | 1916 |
| Grondall | C. | Collie | Maxwell | CM 72 | Collie Municipality | 1927-28 |
| Grondall | E. | Collie | Chevrolet | CM 175 | Collie Municipality | 1927-28 |
| Gronew | Joseph Victor | Bowgada | Fiat | PM ● 140 | Perenjori-Morawa Road Board | 1927-28 |
| Gronow | J. V. | Maida Vale | Columbia | DR ● 22 | Darling Range Road Board | 1924-25 |
| Gronow | J. V. | Maida Vale | Columbia | DR ● 22 | Darling Range Road Board | 1925-26 |
| Gronow | J. V. | Doodlakine | Columbia | KE ● 174 | Kellerberrin Road Board | 1925-26 |
| Gronow | J. V. | Doodlakine | Columbia | KE ● 174 | Kellerberrin Road Board | 1926-27 |
| Gronow & Sons | - | Coorow | Buick | CA ● 44 | Carnamah Road Board | 1925-26 |
| Gronow & Sons | - | Coorow | Buick | CA ● 44 | Carnamah Road Board | 1926-27 |
| Gronow & Sons | - | Coorow | International Truck | CA ● 98 | Carnamah Road Board | 1927-28 |
| Gronow & Sons. | - | Coorow | Buick | CA ● 44 | Carnamah Road Board | 1927-28 |
| Groom | C. | Bay View Terrace, Claremont | Swift | 9357 | Metro Private Car | 1926-27 |
| Groom | C. | Bay View Terrace, Claremont | Swift | 9357 | Metro Private Car | 1927-28 |
| Groom | H. | 117 Wellington Street, Perth | Ford Wagon | 5892 | Metro Private Car | 1924-25 |
| Groom | H. | 117 Wellington Street, Perth | Ford Wagon | 5892 | Metro Private Car | 1925-26 |
