| Organization Name(s) | Located In |
| G and B House | Owen Sound |
| G C Huston Public School | Southampton |
| G'Shawdagawin Day Care Centre | Southampton |
| Gamblers Anonymous, Toronto | Toronto |
| GARDHOUSE Financial Counsel. Meaford | Meaford (Town of) |
| Gateway Rural Health Institute | Seaforth |
| Gateway Victory Church | Wiarton |
| General Insurance OmbudService | Toronto |
| General Mills. Champions for Healthy Kids Grants | Mississauga |
| Geneva Centre for Autism | Toronto |
| Geneva Presbyterian Church | Chesley |
| George Funeral Home Ltd. Lion's Head | Lion's Head |
| George Funeral Home Ltd. Wiarton | Wiarton |
| Georgian Bay Fire & Safety, Owen Sound | Owen Sound |
| Georgian Bay Folk Society | Owen Sound |
| Georgian Chiropractic Centre | Owen Sound |
| Georgian College, Owen Sound | Owen Sound |
| Georgian College, Owen Sound, Literacy and Basic Skills | Owen Sound |
| Georgian College. Owen Sound Campus, Student Services, Centre for Access and Disability Services [The] | Owen Sound |
| Georgian Riding Association for Challenged Equestrians (GRACE) | Owen Sound |
| Geri Fashions of London | London |
| Girl Guides of Canada-Guides du Canada, Ontario Council | Hamilton |
| Girl Guides of Canada. Ontario | Newmarket |
| Glad Tidings Mennonite Church | Arran-Elderslie |
| Glammis Baptist Church | Brockton |
| Golden Dawn Senior Citizen Home | Lion's Head |
| Goodfellows Dragon's Den | Owen Sound |
| Google.GOOG411 | USA |
| Gordon's Pharmasave | Kincardine (Town of) |
| gottarent.com | Thorold |
| Grace Lutheran Church | Kincardine |
| Grain Farmers of Ontario | Guelph |
| Grand River Conservation Authority | Cambridge |
| Grandparents Requesting Access and Dignity Society | Toronto |
| Green House (The) | Wiarton |
| Greentec, Think Recycle | Cambridge |
| Grey Bruce Airbus | Port Elgin |
| Grey Bruce Animal Shelter | Owen Sound |
| Grey Bruce Children's Water Education Council | Grey County |
| Grey Bruce Community Health Corporation | Owen Sound |
| Grey Bruce Community Health Corporation, Community Connections: Housing and Support | Owen Sound |
| Grey Bruce Community Health Corporation, Community Network Support Team | Owen Sound |
| Grey Bruce Community Health Corporation, Consumer Survivor Development Project | Owen Sound |
| Grey Bruce Community Health Corporation, Family Support Initiative | Owen Sound |
| Grey Bruce Community Health Corporation, North Bruce Community Mental Health Services | Wiarton |
| Grey Bruce Cremation and Burial Services | Owen Sound |
| Grey Bruce Eat and Learn | Hanover |
| Grey Bruce Good Food Box Network, Port Elgin Good Food Box | Port Elgin |
| Grey Bruce Good Food Box Network, Saugeen First Nation | Bruce County |
| Grey Bruce Good Food Box Program, Cape Croker - Chippewas of Nawash | Northern Bruce Peninsula |
| Grey Bruce Good Food Box Program, Durham | Durham (Village of) |
| Grey Bruce Good Food Box Program, Kincardine Good Food Box | Kincardine (Town of) |
| Grey Bruce Good Food Box Program, Lucknow and Area Good Food Box | Lucknow |
| Grey Bruce Good Food Box Program, Tara Community Program | Tara |
| Grey Bruce Good Food Box Program, Teeswater and Area Community Program | Teeswater |
| Grey Bruce Good Food Box Program, Walkerton Good Food Box | Walkerton |
| Grey Bruce Good Food Box Program, Wiarton Good Food Box | Wiarton |
| Grey Bruce Health Services, Owen Sound Hospital, Prevention and Early Intervention Program for Psychosis | Owen Sound |
| Grey Bruce Health Services. Lion's Head Site | Lion's Head |
| Grey Bruce Health Services. Owen Sound Site | Owen Sound |
| Grey Bruce Health Services. Owen Sound Site, Community Addiction Treatment Services | Owen Sound |
| Grey Bruce Health Services. Owen Sound Site, Integrated Preschool Speech and Language Services | Owen Sound |
| Grey Bruce Health Services. Owen Sound Site, Mental Health Services Department | Owen Sound |
| Grey Bruce Health Services. Owen Sound Site, Mental Health Services Department, Aftercare | Owen Sound |
| Grey Bruce Health Services. Owen Sound Site, Mental Health Services Department, Assertive Community Treatment Team | Owen Sound |
| Grey Bruce Health Services. Owen Sound Site, Mental Health Services Department, Brief Counselling Service | Owen Sound |
| Grey Bruce Health Services. Owen Sound Site, Sexual Assault and Partner Abuse Care Centre | Owen Sound |
| Grey Bruce Health Services. Southampton Site | Southampton |
| Grey Bruce Health Services. Wiarton Hospital | Wiarton |
| Grey Bruce Health Unit | Owen Sound |
| Grey Bruce Health Unit, Grey Bruce FASD Community Mobilization Committee | Owen Sound |
| Grey Bruce Health Unit, Walkerton | Walkerton |
| Grey Bruce Local Food Project (The) | Owen Sound |
| Grey Bruce Ontario SPCA | Hanover |
| Grey Bruce Palliative Care Hospice Association | Owen Sound |
| Grey Bruce Pet Hospital | Owen Sound |
| Grey Bruce Physiotherapy | Owen Sound |
| Grey Bruce Supervised Access Program | Owen Sound |
| Grey Bruce Withdrawal Management Services | Owen Sound |
| Grey Granite Club | Owen Sound |
| Grey Highlands Limousine and Transportation Service | Markdale |
| Grey Presbytery Resource Centre | Owen Sound |
| Grey Sauble Conservation Authority | Owen Sound |
| Grey-Bruce Arts Collective | Meaford |
| Grey-Bruce Arts Collective, Summer Youth Programs | Meaford |
| Grey-Bruce Community Legal Clinic | Owen Sound |
| Greyhound Canada | Calgary |
| Grief Support Group of Bruce Grey | Port Elgin |
| Grundy Family Dental Care | Lucknow |
| Gundrum [Dr Susan] | Port Elgin |
| Gurbin [Dr Gary] | Kincardine |