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- Galway-Cavendish & Harvey Township Public Library
- Gananoque Public Library
- Georgian Bay (Township of) Public Library
- Georgina Public Libraries
- Grand Valley Public Library
- Gravenhurst Public Library
- Greater Madawaska Public Library
- Greater Sudbury Public Library
- Grey Highlands Public Library
- Grimsby Public Library
- Guelph Public Library
Read more about this topic: List Of Public Libraries In Ontario