| Gloucestershire Warwickshire Steam Railway | Heritage preservation | Churchward House | Tue–Thu 09:30–17:15 |
| GMCoins | Coin dealer | Woodmancote, Cheltenham GL52 9RJ | Sat–Sun 09:00–17:00 |
| GNC Contract Services | Cleaning service | Yanworth, Cheltenham GL54 3LQ | Mon–Fri 08:00–18:00 |
| Go Peri (Bishops Cleeve) | Takeaway | Unit c5, Homelands commercial center, Vale Rd | Mon–Thu 11:30–22:30 |
| GO Vehicle Services Cheltenham and Gloucester | Oil change service | SE41 Gloucestershire Airport, Gloucestershire, Airport | Mon–Fri 08:00–17:00 |
| Godfirst Church Cheltenham - Sunday Morning | Non-denominational church | Parabola Arts Centre | Sun 10:00–11:45 |
| Golden Oak | Carpenter | 42 Winterbotham Rd | Daily 08:00–18:00 |
| Goldsmiths | Watch shop | 43-45 The Promenade | Mon–Sat 10:00–17:30 |
| Gooch Group Ltd | Pressure washing service | Units 39 & 40, Lansdown Industrial Estate | Mon–Fri 08:00–16:00 |
| Greeper Laces | Fashion accessories shop | 15 Murray Cl | Mon–Sat 09:00–17:00 |
| Groves Batteries Ltd | Car battery shop | Park Mews Works, Lypiatt St | Mon–Fri 08:30–17:30 |
| Grundon Waste Management - Cheltenham | Waste-management service | Stoke Orchard Rd | Mon–Fri 07:30–17:00 |
| Habibah | Palestinian restaurant | 291 High St | Mon–Sat 12:00–16:00 |
| Hamilton's Trees & Gardens | Tree service | Sharing Grv | Daily Open 24 hours |
| Hands On Wellbeing | Physical therapy clinic | 32 Portland St | Fri 08:00–20:00 |
| Hanscomb Intercontinental | Quantity surveyor | Eagle Tower, Montpellier Dr | Mon–Fri 08:00–17:00 |
| Haremi | Multimedia and electronic book publisher | Hub8 MX, Off Chester Walk | Fri 09:00–17:00 |
| Health Embassy LTD | Corporate office | Unit 48, Space Business Centre, Tewkesbury Rd | Mon–Fri 09:00–15:00 |
| Heidi Air Conditioning | Air conditioning contractor | Unit 1, Coln Park | Mon–Fri 08:00–16:30 |
| Heli Adventures | Helicopter tour agency | Gloucestershire Airport, Hangar SE49 | Daily 09:00–17:00 |
| Hesters Way Baptist Church | Baptist church | Ashlands Rd | Sun 10:30–11:30 |
| Hire Comes the Bride | Wedding dress rental service | 27 Bafford Approach | Mon–Fri 09:00–17:00 |
| Hiroboy Limited | Hobby shop | A1 Astwood Business Centre, Staverton Connection | Mon–Thu 08:00–16:30 |
| HiTea - Bubble Tea & Crepe Waffle | Bubble tea store | HiTea, 220 High St | Fri 11:00–17:30 |
| Home Farm Holdings | Forestry service | Home Farm | Daily Open 24 hours |
| Home-Start North and West Gloucestershire | Charity | Bank House, Abbey Terrace | Mon–Fri 09:00–15:00 |
| Hope Care Service Agency | Home care service | 5 Court Mews | Mon–Fri 09:00–17:00 |
| Horio | Pregnancy care centre | 39 Fairhaven Rd | Mon–Fri 08:00–18:00 |
| Hot Dog King & Waffles | Hot dog restaurant | 365a High St | Daily 16:00–22:30 |
| Houston Construction | Construction company | Unit 3B, Upper Coln Farm | Mon–Tue 08:00–17:00 |