| Gestion Proxima, Inc. | Quebec |
| Gestion Ressources | Quebec |
| Gestion S.O.A.W. | Quebec |
| Gestion Technologies Affaires | |
| Gestion Yves Foucher, Inc. | Quebec |
| Gestion-Traiteur | |
| Gestisoft | Quebec |
| GestSure Technologies | Ontario |
| Get Building | |
| Get Clear | |
| Get Coding Training, Inc. | |
| Get Set Games, Inc. | Ontario |
| Get Software Services, Inc. | Ontario |
| GetintheLoop | |
| GetLikes | |
| GetOn Marketing, Inc. | British Columbia |
| GetSavvyVA | |
| GetSet Learning | British Columbia |
| Getty Images | |
| Gezere Solutions Web | |
| GFR Pharma Ltd | |
| GGI Solutions | Quebec |
| GHD Digital | Ontario |
| Ghostit | British Columbia |
| GhostPractice | |
| Ghrix | |
| GI Grow | Quebec |
| Gia | |
| Giant Leap AI Technologies, Inc. | |
| Giant Leap Communications | Ontario |
| Giant Marketers, Inc. | |
| Giant Step | Ontario |
| GiantGoat | Ontario |
| Gibraltar & Company | Ontario |
| Gibraltar Solutions, Inc. | Ontario |
| Giftbit | |
| GiG Communications, Inc. | Ontario |
| GigaMax Informatique | Quebec |
| Gigasoft Computers | Alberta |
| Gigatech Systems, Inc. | Alberta |
| GIGE IT Solutions | |
| Gilaroo, Inc. | Ontario |
| Gilcode | |
| Gilead Sciences | |
| Gillette and Associates | Ontario |
| Gilmedia | Ontario |
| Ginger Agency | |
| Ginger Telecom, Inc. | Quebec |
| GINQO | British Columbia |
| Girafe Conseils T.I. | Quebec |