| GreenTec Capital Partners | Hesse |
| GreenTent Design | |
| GreenX Engineering | Saxony |
| Greimel IT-Systemhaus GmbH | Bavaria |
| Greinert & Glatt GmbH | Baden-Württemberg |
| Grenke AG | |
| Grensing Business Technology Consulting GmbH | Baden-Württemberg |
| Grepect GmbH | Lower Saxony |
| GRIBS GmbH | |
| GRID | |
| Grid CAD & Computer GmbH | Bavaria |
| gridscale | North Rhine-Westphalia |
| Gridstore Robotics GmbH | |
| gridX | |
| Grillenberger.de | Bavaria |
| Grips | |
| Gripsware Datentechnik GmbH | Baden-Württemberg |
| GRITH AG | Bavaria |
| Grobmeier Solutions GmbH | Bavaria |
| Gröger EDV Systeme GmbH | Bavaria |
| Grondware | Baden-Württemberg |
| Gronemeyer IT GmbH | North Rhine-Westphalia |
| Großmann GmbH | Thuringia |
| Grote Services | Schleswig-Holstein |
| Grothus van Koten Mittelstandsmarketing KG | North Rhine-Westphalia |
| GroupM Germany | |
| Grover Group GmbH | Berlin |
| Growably GmbH | |
| growney GmbH | |
| GRS Software GmbH | Saarland |
| Gruendermaschine.com | Hesse |
| GRÜN Software AG | North Rhine-Westphalia |
| Grünberg.Digital. GmbH | |
| Gründerallianz Ruhr | North Rhine-Westphalia |
| GründerGeist GmbH | |
| Grundig Business Systems GmbH | Bavaria |
| Grunding-IT | |
| Gruppe für Gestaltung | |
| Grutzeck-Software GmbH | Hesse |
| Grünenthal GmbH | |
| GryphonSoft | Hesse |
| GS Bavaria GmbH | |
| GS electronic Gebr. Schönweitz GmbH | North Rhine-Westphalia |
| GS Electronic GmbH & Co. KG | Hesse |
| GS Gebhardt & Schäfer Industrie-Elektronik GmbH | North Rhine-Westphalia |
| GS1 Germany | Berlin |
| GS7 GmbH | Hamburg |
| Gsa-online | Mecklenburg-Vorpommern |
| GSD Gesellschaft für Software, Entwicklung und Datentechnik mbH | Bavaria |
| GSD Remarketing GmbH & Co. KG | Bavaria |