Hi Diane, and welcome to WikiTree. It would be great if you would upgrade to a Family Membership. You could add Gardner as a tag, and we could help you search for your ggrandmother.
By adding Gardner as a tag you would find about 14317 GARDNERs. Related surnames: GARNER (6562) GARDINER (4655) JARDINE (852) GARTNER (584) GARDENER (564) GARDEN (586) GAERTNER (191) GARDENIER (164) CORDNER (126) GIRDNER (103) GARDINIER (97) GORDNER (80) DUJARDIN (58) CARTNER (60) CARDNER (54), immediately.
Welcome again to WikiTree and good luck in your search.