| Gastro Cloud | Gipuzkoa |
| Gataca | Madrid |
| Gataca | Madrid |
| Gateway S.C.S. | Valladolid |
| GBSB Global Business School | |
| GCI, C.B. | Alicante |
| GCubo | Granada |
| GDM Multimedia | Valencia |
| Gecose Software, S.L. | Barcelona |
| Gedisweb | Málaga |
| Geeknetic | Tarragona |
| Geminis Infomática | Madrid |
| Geneo ITC, S.L. | Madrid |
| General Comunicaciones y Seguridad, S.A. | Madrid |
| Genetsis Partners, S.L. | Madrid |
| Genially | Córdoba |
| 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 |
| Gestión de Ideas . Com | Murcia |
| Gestion de Sistemas Globales de Telecomunicaciones AMUNDO, S.A. | Santa Cruz de Tenerife |
| Gestion Integral de Redes y Aplicaciones Informaticas, S.A. | Madrid |
| Gestión Integral Online, S.L. | Alicante |
| Get-App | La Rioja |
| GetApp | Barcelona |
| GEUP.net | Santa Cruz de Tenerife |
| Géxtion 2002 | Asturias |
| GEYCE AGP Software | Barcelona |
| GhoFi | Girona |
| GiD Simulation | Barcelona |
| GIGAS | Madrid |
| Gilsys | Barcelona |
| Ginsa Informática, S.A. | Valencia |
| Gispert, General de Informática y Control, S.L. | Murcia |
| Global Dominion Access, S.A. | Biscay |
| Global Energy Services Siemsa, S.A. | Biscay |
| Global Graphic Machines | Madrid |
| Global SEO | Barcelona |
| Global3.es | Madrid |
| Globales | Segovia |
| GlobalMultimedia Internet, S.L. | Salamanca |
| GlobalStudio | Madrid |
| Gloria - Life Science Transformation, S.L. | Barcelona |