| GamesIndustry.biz | East Sussex |
| Gamevy Ltd | |
| Gameworld Seven Ltd | Pembrokeshire |
| Gamification+ Ltd | |
| Gamma Telecom Ltd | Berkshire |
| Gappt Ltd | |
| GapSat | |
| Gardenshed.net | East Sussex |
| Gardin | |
| Gardner Systems | |
| Garner SEO | |
| Garrison | |
| Gas Management Services Ltd | Cambridgeshire |
| GASP Solutions Ltd | Bristol |
| GASP Systems Ltd | Devon |
| GateHub Ltd | |
| Gatenby Services | Somerset |
| Gatenox | |
| Gateshead College | |
| Gateway Digital | |
| Gather Social | |
| GatherContent Ltd | Aberdeen |
| Gathered Pixels | Hertfordshire |
| Gator Web Design | Berkshire |
| Gauri Ltd | |
| Gaussion | |
| Gavin Potter | |
| Gavin Taylor | Greater Manchester |
| Gavin Vincent | Cornwall |
| Gavin Willis Creative Marketing Ltd | |
| Gawooni plc | |
| GB Design Studio | |
| GB Group plc | Cheshire |
| GB UK Systems Ltd | Derbyshire |
| GBdirect | West Yorkshire |
| GBS Corporate Training | Hampshire |
| GC Angels | |
| GC Exchange Ltd | |
| GCC Ltd | West Midlands |
| GCD Technologies Ltd | Lisburn and Castlereagh |
| GCH Test & Computer Services Ltd | Berkshire |
| GCL Direct Ltd | West Midlands |
| Gconnect Technology Ltd | Lancashire |
| GD Web Design | South Lanarkshire |
| GDA Consultancy Ltd | |
| GearedApp Ltd | |
| Gearset | |
| Gecko | |
| Gecko Agency Ltd | Edinburgh |
| Geckoboard | |