| G4 Ventures Ltd | Alberta |
| Gabo Solutions, Inc. | Ontario |
| Gabriel Maloney | Quebec |
| Gadget | |
| Gadget's Computers & Electronics, Inc. | Alberta |
| GadgetPlus | British Columbia |
| Gadgets & Gold | Ontario |
| Gadsby Technologies | |
| GAEA Technologies Ltd | Ontario |
| Gaétan Nadeau Informatique | Quebec |
| Gage Applied Technologies, Inc. | Quebec |
| Gagnon Strategix | New Brunswick |
| Gaia Dream Creation | Quebec |
| GaiaDigits | Ontario |
| Gaiia | |
| Gaïma, Inc. | Quebec |
| Gain Control Ltd | Ontario |
| GAL Aerospace | |
| Galactus IT | Ontario |
| Galatea Technologies | Alberta |
| Galaxia Mission Systems | |
| GALAXIA Mission Systems, Inc. | |
| Galaxy Broadband | |
| Galaxy Broadband Communications, Inc. | Ontario |
| Galazyone | Saskatchewan |
| Galenvs Sciences | |
| Galvanzie | British Columbia |
| GAM Tech | Alberta |
| Game On | Quebec |
| Game On Audio | Quebec |
| Game On Mobile | |
| GameGRID | British Columbia |
| Gameloft Montréal | Quebec |
| GamePlan Global Solutions, Inc. | British Columbia |
| Gameplan Initiative | Prince Edward Island |
| Gamerizon Studio, Inc. | Quebec |
| Games from Québec | |
| GameStreet.ca | Ontario |
| GameTime, Inc. | Ontario |
| GamingExcellence | Ontario |
| GammaWave Internet Solutions | New Brunswick |
| GammaWebDesign.com | Alberta |
| Gamotech | |
| Gamy Group, Inc. | |
| GaN Systems, Inc. | Ontario |
| Ganex | |
| gang&lani media | |
| GaNPower International, Inc. | |
| GAO Fiber Optics, Inc. | Ontario |
| GAO Research | Ontario |