| Gabon Business Alliance Network (Gban) CIC | Administrative & support | 2026 |
| Gabriela Wellbeing Ltd | Health & social care | 2026 |
| Gabrielle & Co Ltd | Administrative & support | 2025 |
| Gadamus Ltd | Construction | 2025 |
| Gadget House Limited | Wholesale & retail | 2012 |
| Gadget Shop Ltd | Wholesale & retail | 2025 |
| Gadgets Solution (Romford) Ltd | Manufacturing | 2017 |
| Gadgets Solution Upminster Ltd | Manufacturing | 2019 |
| Gadstore Limited | Wholesale & retail | 2020 |
| Gafarshahi Limited | Real estate | 2026 |
| Gafod UK Limited | Health & social care | 2015 |
| Gainzsports Limited | Wholesale & retail | 2021 |
| Gakusei Karate Limited | Education | 2018 |
| Galaico Ltd | Professional & scientific | 2019 |
| Galant Euro Ltd | Wholesale & retail | 2010 |
| Galantic & Co Limited | Construction | 2009 |
| Galaxon Ltd | Administrative & support | 2021 |
| Galaxy Property Services Ltd | Construction | 2018 |
| Gallon Scaffolding Ltd | Construction | 2022 |
| Gallows Corner Services Limited | Wholesale & retail | 2025 |
| Galuukstore Ltd | Wholesale & retail | 2024 |
| Galvanik Ltd | Wholesale & retail | 2019 |
| Gama Invest Limited | Real estate | 2020 |
| Gaman Logistics Ltd | Administrative & support | 2025 |
| Game on Afrika Ltd | Arts & recreation | 2023 |
| Game Plan PE and Sports Ltd | Education | 2026 |
| Game Plan Zero Limited | Other services | 2023 |
| Gamecraft Ltd | Wholesale & retail | 2020 |
| Gamma Services Limited | Administrative & support | 2022 |
| Gamze Home Trading Limited | Wholesale & retail | 2025 |
| Ganau Ltd | Construction | 2020 |
| Gandhi & Sons Ltd. | Real estate | 2020 |
| Gandhi Carpets Ltd | Wholesale & retail | 2014 |
| Gansaladu Exim Solutions Limited | Manufacturing | 2024 |
| Gants Hill Property Services Limited | Real estate | 2024 |
| Gapp Travel Limited | Transport & logistics | 2017 |
| Garage Sales 28 Ltd | Wholesale & retail | 2025 |
| Garbuz Ltd | Construction | 2024 |
| Gardiner Plant Services Ltd | Manufacturing | 2026 |
| Garmts Ltd | Construction | 2024 |
| Garndene Communication Systems Limited | Extraterritorial | 1976 |
| Garrets Holding Limited | Financial services | 2017 |
| Garrets International Limited | Transport & logistics | 1993 |
| GAS & Green Plumbing Mechanical Limited | Construction | 2020 |
| GAS Control Limited | Construction | 2023 |
| GAS Trap Ltd | Energy | 2021 |
| Gashi AL Limited | Construction | 2017 |
| Gastrohep Health Ltd | Health & social care | 2021 |
| Gateroyale Estates Limited | Real estate | 2022 |
| Gatestar Services Limited | Wholesale & retail | 2022 |
| Gatewayco Ltd | Professional & scientific | 2026 |
| GAZ Decorating Ltd | Construction | 2019 |
| GB Car Solution Ltd | Wholesale & retail | 2024 |
| GB Cargo Ltd | Transport & logistics | 2022 |
| GB Cars Ltd | Wholesale & retail | 2014 |
| GB Electrical Engineering Ltd | Construction | 2024 |
| GB Novac Ltd | Construction | 2017 |
| GB Racks Ltd | Wholesale & retail | 2021 |
| GB Shopfront and Windows Manufacturers Ltd | Manufacturing | 2021 |
| GB Shopfront Manufacturers Ltd | Manufacturing | 2022 |
| GB Stars Trade Ltd | Real estate | 2020 |
| GBD Foods Ltd | Wholesale & retail | 2023 |
| GBG Accessories Ltd | Wholesale & retail | 2018 |
| Gbkr Consultancy Ltd | Information & communication | 2021 |
| Gbna Cleaning Ltd | Administrative & support | 2022 |
| GBP Developments Limited | Real estate | 2015 |
| GBP Estates Limited | Real estate | 2008 |
| GBR Fire Limited | Administrative & support | 2011 |
| Gbrl Limited | Wholesale & retail | 2025 |
| GC Jetting Ltd | Administrative & support | 2025 |
| Gcon Limited | Construction | 2015 |
| GCT Building Innovation Ltd | Construction | 2024 |
| GD Installation Ltd | Construction | 2024 |
| GD Spray Limited | Construction | 2026 |
| Gd&M Electrical Limited | Construction | 2017 |
| GDK Contractors Ltd | Construction | 2016 |
| GDS Consultants Limited | Information & communication | 2015 |
| Gdsc Limited | Information & communication | 2013 |
| Geazy Ltd | Wholesale & retail | 2025 |
| Gedon - Psychology Services Ltd | Health & social care | 2014 |
| GEE GEE Smiles Ltd | Health & social care | 2022 |
| Geeknetic Ltd | Education | 2022 |
| Geere & Pepper Memorials Limited | Other services | 2012 |
| Gekukit Ltd | Information & communication | 2025 |
| GEL Consultants (Essex) LLP | | 2010 |
| GEL Limited | Hospitality | 2025 |
| Gelo Ltd | Construction | 2025 |
| Gelu Number One Ltd | Administrative & support | 2016 |
| GEM Construction & Maintenance Limited | Construction | 1997 |
| GEM Consulting Limited | Professional & scientific | 2021 |
| Gemini Care Limited | Health & social care | 1997 |
| Gemini Recruitment Ltd | Administrative & support | 2003 |
| Gemma Roberts Limited | Administrative & support | 2019 |
| Gems Builders Ltd | Construction | 2014 |
| Gems International (UK) Limited | Mining & quarrying | 2021 |
| GEN Property Development Services Ltd | Real estate | 2018 |
| GEN20 Ltd | Administrative & support | 2019 |
| Gender and Child Advancement (GCA) International Ltd | Education | 2014 |
| General Construct Ltd | Construction | 2017 |
| General Transport Services Ltd | Transport & logistics | 2023 |