| Gabi's Wigs Boutique | Toronto |
| Gam Diagnostic Imaging (Bramalea X-Ray and Ultrasound) | Brampton |
| Gam Diagnostic Imaging (Tobram and North Park X-Ray and Ultrasound) | Brampton |
| Garderie Cercle de l'amitié Mississauga | Meadowvale |
| Garderie Du Cercle de l'Amitié, Brampton | Brampton |
| Garderie La Fontaine de l'Amitié | Clarkson |
| Genesis Lodge | Brampton |
| Genetic Aortic Disorders Association Canada | Mississauga |
| Geneva Centre for Autism | Toronto North |
| Georgian College, Career and Employment Community Services | Orangeville |
| German Canadian Club Hansa | Mississauga |
| Giant Leap Childcare Incorporated | Brampton |
| Gillingham Pharmacy | Brampton |
| Girl Guides of Canada, Camp Ma-Kee-Wa | Mono Mills |
| Girl Guides of Canada - Guides du Canada, Ontario Council | Caledon |
| Glen Cade Pharmacy | Etobicoke |
| Glen Erin Pharmacy, Mississauga | Mississauga |
| Glen Gate Pharmacy | Mississauga |
| Glendale Veterinary Hospital | Caledon Village |
| Glenn Huron Pharmacy | Mississauga |
| Glenroy Preschool Centre | Cooksville |
| Global Affairs Canada, Consular Services, Travel Information and Assistance for Canadians Abroad | Ottawa |
| GO Transit | Toronto |
| Gold Circle Early Childhood Day Care Centre | Etobicoke North |
| Golden Orchard Montessori School | Cooksville |
| Good Luck Pharmacy | Mississauga |
| Good Shepherd Home Care (The) | Etobicoke North |
| Gordon Denture Services | Brampton |
| Gordon Graydon Early Learning & Child Care Centre, Family Day Care Services | Mississauga (City of) |
| Gore Diagnostic Imaging | Brampton |
| Goreway Physiotherapy and Rehabilitation Centre | Malton |
| Grace Community Food Share | Toronto |
| Grace Court, Seniors Apartments | Brampton |
| Grace Manor | Brampton |
| Grace Pharmacy | Etobicoke North |
| Grand Park Pharmacy | Mississauga |
| Grand Valley Public Library | Grand Valley |
| Great Big Theatre Company | |
| Great Big Theatre Company, Brampton Location | Brampton |
| Great Big Theatre Company, GBTC | Brampton (City of) |
| Great Big Theatre Company, Mississauga / Lorne Park Location | Lorne Park |
| Great Big Theatre Company, Mississauga / Meadowvale Location | Meadowvale |
| Great Big Theatre Company, Mississauga / Port Cred Location | Cooksville |
| Great Big Theatre Company, Mississauga, Southeast location | Mississauga |
| Great Lakes Medical Centre | Brampton |
| Greater Toronto Airports Authority, Toronto Pearson International Airport | Malton |
| Greater Toronto Airports Authority, Toronto Pearson International Airport, "Welcome Team" Volunteer Program | Mississauga |
| Greencross Pharmacy | Brampton |
| Greenfield Pharmacy | Mississauga |
| Greenway Retirement Village by Revera | Brampton |
| GroceryMarket.ca, On-line Grocery Shopping and Delivery | |
| Growing Opportunities for Adult Life Skills-GOALS | Bolton |
| Guardian - Heritage Hills Pharmacy | Mississauga |
| Guardian - Marcos Pharmacy | Mississauga |
| Guardian - Matheson Pharmacy | Mississauga |
| Guardian - Mississauga-Enfield Place | Mississauga |
| Guardian - Neilson Pharmacy | Mississauga |
| Guardian Pharmacy, Brampton - Castle Oaks Crossing (Castle Oaks) | Brampton |
| Guardian Angel Care | Mississauga |
| Guardian Pharmacy, Bolton - King St E (Leggett and Smith) | Bolton |
| Guardian Pharmacy, Brampton - 630 Peter Robertson Blvd (Springdale) | Brampton |
| Guardian Pharmacy, Brampton - 7700 Hurontario St (Morelli's) | Brampton |
| Guardian Pharmacy, Brampton - 945 Peter Robertson Blvd (Bramdale) | Brampton |
| Guardian Pharmacy, Brampton - Ashby Field Rd (Spring Valley) | Brampton |
| Guardian Pharmacy, Brampton - Balmoral Dr (Southgate) | Brampton |
| Guardian Pharmacy, Brampton - Clarence St (Nathan Pharmacy) | Brampton |
| Guardian Pharmacy, Brampton - Cottrelle Blvd (Valley Creek) | Brampton |
| Guardian Pharmacy, Brampton - Kennedy Rd (Clinik) | Brampton |
| Guardian Pharmacy, Brampton - Queen St E (Pharma Center) | Brampton |
| Guardian Pharmacy, Brampton - Steeles Ave (Sheridan) | Brampton |
| Guardian Pharmacy, Caledon - Airport Rd (Caledon East) | Caledon East |
| Guardian Pharmacy, Eglington Ave East | Mississauga |
| Guardian Pharmacy, Woodbridge - Rutherford Road (Rutherford) | Woodbridge |
| Guardian-IDA, Etobicoke First Pharmacy | Etobicoke |
| Guiding Light Autism Centre, Autism Service Provider | Brampton (City of) |
| Guiding Light Montessori Inc | Peel Region |
| Guru Nanak Dev Pharmacentre | Mississauga |
| Gymnastics Canada | Ottawa |
| Gymnastics Mississauga | Mississauga |