| Gam Diagnostic Imaging, Oakville - Trafalgar Rd, Diagnostic Imaging | Oakville |
| Gam Diagnostic Imaging, Oakville - Hospital Gate, Diagnostic Imaging | Oakville |
| Gamblers Anonymous | Halton Region |
| Ganohkwasra Family Assault Support Services, Ohsweken - Chiefswood Rd, Main Office | Ohsweken |
| Ganohkwasra Family Assault Support Services, Ohsweken - Chiefswood Rd, Community Counselling | Ohsweken |
| Ganohkwasra Family Assault Support Services, Ohsweken - Chiefswood Rd, Community Education | Ohsweken |
| Ganohkwasra Family Assault Support Services, Ohsweken - Chiefswood Rd, Emergency Shelter | Ohsweken |
| Ganohkwasra Family Assault Support Services, Ohsweken - Chiefswood Rd, Next Step Housing | Ohsweken |
| Ganohkwasra Family Assault Support Services, Ohsweken - Chiefswood Rd, Outreach Services | Ohsweken |
| Ganohkwasra Family Assault Support Services, Ohsweken - Chiefswood Rd, Sexual Violence Healing Centre | Ohsweken |
| Ganohkwasra Family Assault Support Services, Ohsweken - Sunrise Crt, Youth Lodge | Ohsweken |
| Gas & Hydro Bill Assistance, Burlington | Burlington |
| Gas & Hydro Bill Assistance, Halton Hills | Halton Hills |
| Gas & Hydro Bill Assistance, Milton | Milton |
| Gas & Hydro Bill Assistance, Oakville | Oakville |
| Gay Men's Sexual Health Alliance | Toronto Downtown East |
| General Topics and Information, Burlington | Burlington |
| General Topics and Information, Halton Hills | Halton Hills |
| General Topics and Information, Halton Region | Halton Region |
| General Topics and Information, Milton | Milton |
| General Topics and Information, Oakville | Oakville |
| General Topics and Information - Burlington | Burlington |
| General Topics and Information - Halton Hills | Halton Hills |
| General Topics and Information - Halton Region | Halton Region |
| General Topics and Information - Halton Region, No Physical Location | Ontario |
| General Topics and Information - Milton | Milton |
| General Topics and Information - Oakville | Oakville |
| Generations Church of the Nazarene | Oakville |
| Genesis Pharmacy, Pharmacy Services | Halton Hills |
| Genesis Walk-in and Family Clinic | Georgetown |
| Genetic Aortic Disorders Association Canada, Mississauga | Mississauga |
| Geneva Centre for Autism | Toronto Downtown North |
| George Brown College, St James Campus, H Building, Academic Upgrading Program for Deaf and Hard of Hearing Adults | Toronto |
| George Brown College, WAVE Clinic | Toronto |
| Georgetown Agricultural Society, Georgetown Fall Fair | Georgetown |
| Georgetown Aikido | Georgetown |
| Georgetown and District Ministerial Association | Georgetown |
| Georgetown and District Ministerial Association, Community Unity Halton Hills | Halton Hills |
| Georgetown Art Express | Georgetown |
| Georgetown Bach Chorale | Georgetown |
| Georgetown Bread Basket, Food Bank | Georgetown |
| Georgetown Christian Fellowship | Halton Hills |
| Georgetown Christian Reformed Church | Georgetown |
| Georgetown Daycare Centre and Nursery School, Norval, Licensed Child Care Centre | Halton Hills |
| Georgetown Daycare Centre and Nursery School, Georgetown, Licensed Child Care Centre | Georgetown |
| Georgetown Globe Productions, Community Musical Theatre Group | Georgetown |
| Georgetown Highland Games | Georgetown |
| Georgetown Horticultural Society | Georgetown |
| Georgetown Hospital Foundation | Halton Hills |
| Georgetown Junior Badminton Club, Recreational Badminton | Georgetown |
| Georgetown Ladies Powderpuff League | Georgetown |
| Georgetown Lawn Bowling Club | Georgetown |
| Georgetown Lions Club | Georgetown |
| Georgetown Little Theatre Productions | Georgetown |
| Georgetown Pharmacy, Pharmacy Services | Halton Hills |
| Georgetown Pipe Band | Georgetown |
| Georgetown Racquet Club | Georgetown |
| Georgetown Rug Hooking Guild | Georgetown |
| Georgetown Slopitch League | Georgetown |
| Georgetown Soccer Club | Georgetown |
| Georgetown South Junior Badminton Club, Recreational Badminton | Georgetown |
| Getting Settled in Ontario | Ontario |
| Gift of Giving Back (The), Community Food Drive | Burlington |
| Girl Guides of Canada, Find a Guiding Unit | Ontario |
| Glad Tidings Pentecostal Church | Burlington |
| Glen Abbey Child Care Centre, Licensed Child Care Centre | Oakville |
| Glen Abbey Ladies Slo Pitch League | Oakville |
| Glen Abbey Montessori School - West Oak Montessori School, Licensed Child Care Centre | Oakville |
| Glen Abbey Neighbourhood Association | Oakville |
| Glen Abbey Slo-Pitch League | Oakville |
| Glen Abbey United Church | Oakville |
| Glen Eden Pharmacy, Pharmacy Services | Milton |
| Glen Mills Cooperative Homes, Georgetown | Georgetown |
| Glen Oaks Co-operative Homes | Oakville |
| Glenashton Daycare Centre, Licensed Child Care Centre | Oakville |
| Glenashton Medical Centre, Walk-in Clinic and Family Practice | Oakville |
| Glenashton Pharmacy, Pharmacy Services | Oakville |
| Glenn Arbour Academy | Burlington |
| Global Friends Foundation | Oakville |
| GO Transit, Burlington & Oakville, Train Service | Halton South |
| GO Transit, Acton & Georgetown, Train Service | Halton Hills |
| GO Transit, GO Transit, Head Office | Toronto |
| GO Transit, Milton, Train Service | Milton |
| Golden Horseshoe Beekeepers Association, Golden Horseshoe Beekeepers Association Meetings | Jerseyville |
| Golden Horseshoe Chorus | Burlington |
| Golden Horseshoe Disabled Sports Association, Vipers Wheelchair Basketball | Burlington |
| Golden Horseshoe Touch Football Association | Burlington |
| Golden Horseshoe Woodturners Guild | Ancaster |
| Goldencare Pharmacy, Pharmacy Services | Burlington |
| Goldfish Swim School, Oakville, Swimming Lessons and Water Safety for Infants and Children | Oakville |
| Goldfish Swim School, Burlington, Swimming Lessons and Water Safety for Infants and Children | Burlington |
| Golf Canada, Canadian Golf Hall of Fame & Museum | Oakville |
| Golf Canada, Scholarship Program and University Golf Program Grants | Oakville |
| Good Shepherd Centres, Good Shepherd Centres, Family Centre Emergency Shelter Services | Hamilton |
| Good Shepherd Centres, Martha House Location, Good Shepherd Centres, Women's Services | Hamilton |
| Good Shepherd Centres, Good Shepherd Women's Emergency Services, Martha House | Hamilton |
| Good Shepherd Centres, Mary's Place Location, Good Shepherd Centres, Women's Services | Hamilton |
| Good Shepherd Centres, Good Shepherd Women's Emergency Services, Mary's Place | Hamilton |
| Good Shepherd Centres, Mary's Place Location, Learning Effective Anti-Violence in Families | Hamilton |
| Good Shepherd Centres, Notre Dame House Youth Shelter | Hamilton |
| Good Shepherd Centres, Regina's Place Services | Hamilton |
| Good2Talk, Telephone and Virtual Service | Toronto |
| Goodwill, The Amity Group, Burlington - Upper Middle Road, Integrated Employment Services | Burlington |
| Goodwill, The Amity Group, Burlington - Guelph Line, Donation Centre | Burlington |
| Goodwill, The Amity Group, Burlington - New St, Retail Store and Community Donation Centre | Burlington |
| Goodwill, The Amity Group, Burlington - Upper Middle Road, Goodwill Career Centre - Ontario Disability Support Program Employment Supports | Burlington |
| Goodwill, The Amity Group, Oakville - Speers Rd, Retail Store and Community Donation Centre | Oakville |
| Goodwill, The Amity Group, Oakville - Trafalgar Rd, Donation Centre | Oakville |
| Goodwill, The Amity Group, Oakville - Trafalgar Rd, Integrated Employment Services | Oakville |
| Grace Anglican Church | Milton |
| Grace United Church | Burlington |
| Graceway Baptist Church | Milton |
| Grandmother's Voice | Halton Region |
| Great Big Theatre Company, Halton Locations, Childrens' Theatre Arts Programs | Halton Region |
| Greek Community of Burlington and District | Burlington |
| Green Care Farms, Outdoor Program for People with Dementia | Milton |
| Green Communities Canada | Peterborough |
| Green Shield Canada, Greenshield Cares Essential Medicines Program | Windsor |
| Greenpeace Canada, Toronto | Toronto |
| Grenfell Ministries, National Overdose Response Service | Hamilton |
| Grindstone Award Foundation, Recreation Expense Assistance for Female Hockey Players | British Columbia |
| Grocery Delivery and Shopping Assistance, Burlington | Burlington |
| Grocery Delivery and Shopping Assistance, Halton Hills | Halton Hills |
| Grocery Delivery and Shopping Assistance, Milton | Milton |
| Grocery Delivery and Shopping Assistance, Oakville | Oakville |
| GTA Home Health Care, In Home Care Services | Georgetown |
| Guardian Aldershot Pharmacy, Pharmacy Services | Burlington |
| Guardian Bonavista Pharmacy, Pharmacy Services | Burlington |
| Guardian Burlington St Joseph's Pharmacy, Pharmacy Services | Burlington |
| Guardian Morelli's Pharmacy, Burlington - Fairview St, Pharmacy Services | Burlington |
| Guardian Morelli's Pharmacy, Burlington - Walkers Line, Pharmacy Services | Burlington |
| Guardian Mountainside Pharmacy, Pharmacy Services | Burlington |
| Guardian Pharmacy, Georgetown - Main St S (Young's Pharmacy and Homecare), Pharmacy Services | Halton Hills |
| Guardian Pharmacy, Oakville - Lakeshore Rd E, Pharmacy Services | Oakville |
| Guardian Pharmacy, Oakville - Lakeshore Rd W (OSR Pharmacy), Pharmacy Services | Oakville |
| Guardian Pharmacy, Oakville - Trafalgar Rd (Cims Pharmacy), Pharmacy Services | Oakville |
| Guardian Pharmacy, Georgetown - Mountainview Rd S (Mountainview Pharmacy), Pharmacy Services | Halton Hills |
| Guelph General Hospital, Emergency Department | Guelph |
| Guelph General Hospital | Guelph |
| Guelph General Hospital, Guelph Wellington Care and Treatment Centre for Sexual Assault and Domestic Violence | Guelph |
| Guru Ravidas Gurdwara Sahib Burlington | Burlington |
