Organization / Program Name(s)Located In Office Phone E-Mail Website
Ganaraska Forest CentrePort Hope Ganaraska Forest Centre: 905-797-2721 
Ganaraska Region Conservation Authority Main Office: 905-885-8173
gfc@grca.on.ca www.ganaraskaforestcentre.ca
Ganaraska Region Conservation Authority, Port Hope - County Rd 28, Ganaraska Region Conservation Authority - AdministrationPort Hope 905-885-8173 info@grca.on.ca www.grca.on.ca
Gate 3:16 Outreach CentreOshawa 905-432-5316 office@gate316.org www.gate316.com
Gemini GymnasticsOshawa 905-576-2164 admin@geminigymnastics.com www.geminigymnastics.com
General W. Sikorski Polish Veterans' Association HallOshawa 905-728-4152 * Catering and Hall Rental 289-356-6399 * Red Room and Kitchen 905-728-1218 polishvetshall@gmail.com www.generalsikorskihall.com
German Language School LoreleyOshawa 905-576-9065 school@clubloreley.org www.clubloreley.org
Girl Guides of Canada-Guides du Canada, Ontario CouncilDurham Region 416-926-2351 ext 2640 communityplan.coord4@guidesontario.org www.girlguides.ca/ON
Girls Incorporated of DurhamAjax 905-428-8111 info@durham.girls-inc.org www.girlsinc-durham.org
Girls Incorporated of Durham, Food 4 Thought ProgramAjax 905-428-8111 ext 22 tmccannell@durham.girls-inc.org www.girlsinc-durham.org
Glazier Medical CentreOshawa 905-579-1212 info@glaziermedical.com www.glaziermedical.com
Glen Hill MarnwoodClarington 905-623-5731   www.dchomes.ca
Glen Hill StrathavenBowmanville 905-623-2553   www.dchomes.ca
Glen Stewart ClubhouseOshawa 905-728-3421    
GO Transit, Durham RegionDurham Region 416-869-3200 customerrelations@gotransit.com www.gotransit.com
Good2TalkToronto Downtown Central   info@good2talk.ca www.good2talk.ca
Gowns for GirlsOshawa   gownsforgirls@drps.ca  
Grandview Children's CentreOshawa 905-728-1673 info@grandviewkids.ca www.grandviewkids.ca
Grant PhysiotherapyBowmanville 905-623-2783 grantphysiotherapy@gmail.com  
Great Big Theatre CompanyWhitby   onstage@gbtc.com www.gbtc.com
Great Big Theatre Company, Oshawa Location, Summer Theatre CampsOshawa   onstage@gbtc.com www.gbtc.com
Great Big Theatre Company, Whitby Location, Summer & March Break Theatre Arts CampsWhitby   onstage@gbtc.com www.gbtc.com
Great Canadian Shoreline Cleanup, Durham RegionOntario   shorelinecleanup@ocean.org www.shorelinecleanup.ca
Greater Oshawa Chamber of CommerceOshawa 905-728-1683 admin@oshawachamber.com www.oshawachamber.com
Group 74Brooklin   Group74@hotmail.ca www.Group74.org