| Gala Marketing Online | |
| GalChimia | |
| Galdana Ventures | Barcelona |
| Galdón Software, S.A. | Granada |
| Galeneo | Madrid |
| Galeo | Madrid |
| Galerna Estudio | Asturias |
| Galianet Webs | A Coruña |
| Galileo Galilei | Madrid |
| Galiset Soluciones Informáticas, S.L. | A Coruña |
| Galitec Consultores Informáticos | Pontevedra |
| Galiza Design | A Coruña |
| Galynet, S.L. | A Coruña |
| Gamboa Firmware, S.L. | Madrid |
| Game Strategies | |
| Game Telecomunicaciones, S.A. | Biscay |
| Game Troopers, S.L. | |
| GameBCN | Barcelona |
| Gamelab Conference | Barcelona |
| GamesAjare | Barcelona |
| Garri2 | Madrid |
| Gastro Cloud | Gipuzkoa |
| Gataca | Madrid |
| Gate2Brain | |
| Gateway S.C.S. | Valladolid |
| Gavisa | |
| GBSB Global Business School | |
| GCI, C.B. | Alicante |
| GCubo | Granada |
| GDM Multimedia | Valencia |
| Gecose Software, S.L. | Barcelona |
| Gedisweb | Málaga |
| Geeknetic | Tarragona |
| Geistek Pharma, S.L. | |
| Geminis Infomática | Madrid |
| Geneo ITC, S.L. | Madrid |
| General Comunicaciones y Seguridad, S.A. | Madrid |
| Genetsis Partners, S.L. | Madrid |
| Genially | Córdoba |
| Genomcore, S.L. | |
| Genomica, S.L.U. | Madrid |
| Geoblink | Madrid |
| Geograma, S.L. | Álava |
| Geomobile | Madrid |
| Germans Trias i Pujol Research Institute | |
| Gesprodat | Valencia |
| Gespymes | Valencia |
| Gestazión | Madrid |
| Gestinet | Barcelona |
| Gestión de Activos Tecnológicos, S.L. | Madrid |