| Name | Phone | Category |
| GAD GROUP TECHNOLOGY | (630) 226-1013 | Business Consultants |
| GARCIA MUSIC ACADEMY | (630) 442-0129 | Music Store |
| GATEWAY FOUNDATION | (708) 859-0161 | Substance Abuse Services |
| GATTO'S RESTAURANT & BAR | (630) 515-6400 | Restaurants |
| GIBSONS BAR & STEAKHOUSE | (630) 954-0000 | Restaurants |
| GINGHAM TREE RESALE SHOP | (630) 275-4438 | Resale Stores |
| GOLDEN SPARROW TATTOO INC. | (630) 999-1914 | Beauty & Health |
| GOLDFINGER BREWING COMPANY | (630) 541-9728 | Breweries |
| GOLDSTINE, SKRODZKI, RUSSIAN, NEMEC AND HOFF, LTD. | (630) 655-6000 | Attorneys - Business |
| GOOD THERAPY COUNSELING | 630-473-3971 | Mental Health |
| GOODWILL STORE AND DONATION CENTER | (630) 964-1343 | Retail |
| GOTCHA COVERED OF OAK BROOK | (833) 838-0770 | Window Treatments |
| GRAND APPLIANCE | (331) 481-6650 | Appliances |
| GRAND DUKE'S RESTAURANT | (708) 594-5622 | Restaurants |
| GUARDIAN RADON MITIGATION & ELECTRICAL SERVICES | (630) 768-9836 | Radon |