Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Gilroy (historical) | Locale | 1461 | Gallatin | 45 39 36 N | 111 09 54 W |
| Gilt Edge Cemetery | Cemetery | 1398 | Fergus | 47 07 57 N | 109 12 13 W |
| Gilt Edge Creek | Stream | | Mineral | 47 21 44 N | 115 29 56 W |
| Gilt Edge Hospital (historical) | Hospital | 1377 | Fergus | 47 07 37 N | 109 12 08 W |
| Gilt Edge Mine | Mine | 1538 | Fergus | 47 08 42 N | 109 13 43 W |
| Gilt Edge School (historical) | School | 1372 | Fergus | 47 07 41 N | 109 12 06 W |
| Giltedge | Populated Place | 1377 | Fergus | 47 07 37 N | 109 12 08 W |
| Giltedge Mine | Mine | 1514 | Fergus | 47 08 39 N | 109 13 39 W |
| Giltedge Mine | Mine | 2098 | Madison | 45 14 04 N | 111 55 03 W |
| Giltedge Post Office (historical) | Post Office | 1372 | Fergus | 47 07 41 N | 109 12 06 W |
| Gimlet Creek | Stream | | Powell | 46 37 15 N | 112 37 36 W |
| Gimlet Gulch | Valley | | Silver Bow | 46 00 28 N | 112 36 16 W |
| Gimlet Mine | Mine | 1866 | Powell | 46 38 26 N | 112 43 45 W |
| Gimlet Mine | Mine | 1881 | Powell | 46 38 31 N | 112 43 55 W |
| Gin Gulch | Valley | | Sanders | 48 03 50 N | 115 48 41 W |
| Ginger Gulch | Valley | | Granite | 46 18 17 N | 113 31 34 W |
| Gingery Cemetery | Cemetery | 772 | Sanders | 47 20 26 N | 114 41 30 W |
| Ginny Creek | Stream | | Beaverhead | 45 21 34 N | 113 16 33 W |
| Ginny Mountain | Summit | 1431 | Missoula | 46 49 58 N | 113 56 55 W |
| Gipsy Creek | Stream | | Meagher | 46 30 58 N | 111 10 32 W |
| Gipsy Lake | Reservoir | 1931 | Meagher | 46 30 12 N | 111 12 39 W |
| Girard | Populated Place | 741 | Richland | 47 52 04 N | 104 25 18 W |
| Girard Gulch | Valley | | Deer Lodge | 46 11 05 N | 112 45 38 W |
| Girard Post Office (historical) | Post Office | 747 | Richland | 47 52 02 N | 104 25 20 W |
| Girard School (historical) | School | 749 | Richland | 47 52 02 N | 104 25 22 W |
| Gird Creek | Stream | | Granite | 46 30 18 N | 113 13 32 W |
| Gird Creek | Stream | | Ravalli | 46 15 60 N | 114 08 13 W |
| Gird Creek Mine | Mine | 1514 | Granite | 46 29 12 N | 113 12 48 W |
| Gird Point | Populated Place | 2346 | Ravalli | 46 12 27 N | 113 54 41 W |
| Girds Creek Post Office (historical) | Post Office | 1089 | Ravalli | 46 15 57 N | 114 08 08 W |
| Girl Creek | Stream | | Yellowstone | 45 52 27 N | 108 17 46 W |
| Girl Scout Park | Park | 1012 | Cascade | 47 30 39 N | 111 18 24 W |
| Girl Scout Shelter | Park | 1553 | Beaverhead | 45 12 55 N | 112 37 51 W |
| Gish Mine | Mine | 1711 | Sweet Grass | 45 28 41 N | 110 12 11 W |
| Gist Ranch | Locale | 710 | Blaine | 47 48 18 N | 109 00 39 W |
| Give Out Morgan Creek | Stream | | Sheridan | 48 29 28 N | 105 18 46 W |
| Gjerde Ranch | Locale | 1652 | Park | 46 11 25 N | 110 44 09 W |
| GJP Suta Dam | Dam | 1217 | Toole | 48 54 06 N | 112 07 09 W |
| Glacier Basin | Basin | 1938 | Flathead | 48 36 37 N | 113 47 02 W |
| Glacier Bible Camp | Locale | 930 | Flathead | 48 23 32 N | 114 04 27 W |
| Glacier Campground | Locale | 939 | Lake | 47 57 40 N | 114 11 19 W |
| Glacier Christian School | School | 944 | Flathead | 48 22 46 N | 114 10 48 W |
| Glacier Church | Church | 913 | Flathead | 48 13 15 N | 114 18 13 W |
| Glacier Colony | Populated Place | 1256 | Glacier | 48 49 58 N | 112 13 08 W |
| Glacier County | Civil | 1285 | Glacier | 48 39 00 N | 112 58 03 W |
| Glacier County Courthouse | Building | 1151 | Glacier | 48 37 57 N | 112 19 35 W |
| Glacier County Historical Society Museum | Building | 1148 | Glacier | 48 38 08 N | 112 19 44 W |
| Glacier County Library | Building | 1150 | Glacier | 48 38 05 N | 112 19 55 W |
| Glacier County Medical Center | Hospital | 1175 | Glacier | 48 37 43 N | 112 19 38 W |
| Glacier County Medical Center Nursing Home | Hospital | 1175 | Glacier | 48 37 43 N | 112 19 38 W |
| Glacier County Medical Clinic | Hospital | 1175 | Glacier | 48 37 43 N | 112 19 38 W |
| Glacier County Sheriffs Office | Building | 1151 | Glacier | 48 37 57 N | 112 19 35 W |
| Glacier Creek | Stream | | Missoula | 47 31 50 N | 113 43 15 W |
| Glacier Creek | Stream | | Park | 45 09 34 N | 109 59 39 W |
| Glacier Elementary School | School | 1252 | Glacier | 48 49 51 N | 112 13 08 W |
| Glacier Green Lake | Lake | 2729 | Park | 45 08 38 N | 109 55 26 W |
| Glacier Lake | Lake | 2689 | Beaverhead | 45 28 07 N | 112 59 37 W |
| Glacier Lake | Lake | 2124 | Missoula | 47 02 41 N | 113 56 06 W |
| Glacier Lake | Lake | 1605 | Missoula | 47 22 17 N | 113 49 25 W |
| Glacier Lake | Lake | 2674 | Park | 46 02 51 N | 110 20 32 W |
| Glacier Lake | Reservoir | 2955 | Carbon | 45 00 29 N | 109 32 25 W |
| Glacier Lake | Reservoir | 2955 | Carbon | 45 00 18 N | 109 31 57 W |
| Glacier Lake | Reservoir | 2124 | Missoula | 47 02 42 N | 113 56 09 W |
| Glacier Lake Dam | Dam | 2124 | Missoula | 47 02 42 N | 113 56 09 W |
| Glacier Lake North Dam | Dam | 2955 | Carbon | 45 00 18 N | 109 31 57 W |
| Glacier Lake South Dam | Dam | 3005 | Carbon | 45 00 12 N | 109 31 57 W |
| Glacier Memorial Gardens | Cemetery | 911 | Flathead | 48 14 47 N | 114 19 46 W |
| Glacier Mountain Fellowship | Church | 891 | Flathead | 48 13 30 N | 114 15 23 W |
| Glacier Mountain Shadows RV Park | Locale | 943 | Flathead | 48 21 50 N | 114 08 53 W |
| Glacier National Park | Park | 1404 | Flathead | 48 41 46 N | 113 48 25 W |
| Glacier National Park Headquarters | Locale | 969 | Flathead | 48 30 10 N | 113 59 07 W |
| Glacier Park | Locale | 1465 | Glacier | 48 26 32 N | 113 13 09 W |
| Glacier Park Autumn Creek Trail | Trail | 1667 | Glacier | 48 24 51 N | 113 17 48 W |
| Glacier Park International Airport | Airport | 904 | Flathead | 48 18 41 N | 114 15 21 W |
| Glacier Park Lodge Golf Course | Locale | 1470 | Glacier | 48 26 43 N | 113 13 23 W |
| Glacier Peak | Summit | 3762 | Park | 45 08 59 N | 109 50 58 W |
| Glacier Peaks | Summit | 2827 | Lake | 47 21 36 N | 113 53 52 W |
| Glacier Peaks RV Park | Locale | 933 | Flathead | 48 21 50 N | 114 09 03 W |
| Glacier Pines RV Park | Locale | 888 | Flathead | 48 13 18 N | 114 15 38 W |
| Glacier RV Park | Locale | 1004 | Toole | 48 30 36 N | 111 51 58 W |
| Glacier Sloughs | Swamp | 1378 | Missoula | 47 25 06 N | 113 45 35 W |
| Glacier Valley Quaker Worship Group | Church | 901 | Flathead | 48 11 45 N | 114 18 46 W |
| Glacier View Baptist Church | Church | 1334 | Glacier | 48 33 25 N | 113 00 48 W |
| Glacier View Christian School | School | 929 | Lake | 47 31 44 N | 114 06 05 W |
| Glacier View Golf Club | Locale | 961 | Flathead | 48 30 15 N | 113 59 53 W |
| Glacier View Mountain | Summit | 1857 | Flathead | 48 37 33 N | 114 10 35 W |
| Glacier View Ranger District Ranger Office | Building | 948 | Flathead | 48 22 54 N | 114 10 17 W |
| Glacier Wall | Cliff | 1804 | Flathead | 48 43 08 N | 113 47 52 W |
| Glad Tidings Assembly of God Church | Church | 967 | Missoula | 46 51 15 N | 114 02 18 W |
| Glade Creek | Stream | | Lewis and Clark | 47 29 36 N | 112 53 09 W |
| Gladewater Ditch | Canal | 1074 | Big Horn | 44 59 51 N | 106 53 28 W |
| Gladiator Mountain | Summit | 2498 | Flathead | 47 37 51 N | 113 09 31 W |
| Gladiolus Dam | Dam | 960 | Toole | 48 13 36 N | 111 19 15 W |
| Gladowski Dam | Dam | 760 | Richland | 47 49 36 N | 104 28 14 W |
| Gladstone Creek | Stream | | Lewis and Clark | 47 02 05 N | 112 10 08 W |
| Gladstone Mine | Mine | 2065 | Deer Lodge | 46 11 02 N | 113 03 23 W |
| Glascock Spring | Spring | 701 | Phillips | 48 34 10 N | 107 27 52 W |
| Glasgow | Locale | 638 | Valley | 48 11 42 N | 106 38 10 W |
| Glasgow | Populated Place | 638 | Valley | 48 11 49 N | 106 38 12 W |
| Glasgow Air Force Base (historical) | Military (Historical) | 838 | Valley | 48 24 13 N | 106 31 07 W |
| Glasgow Base Pond Fishing Access Site | Locale | 832 | Valley | 48 26 46 N | 106 34 39 W |
| Glasgow City County Library | Building | 637 | Valley | 48 11 36 N | 106 38 12 W |
| Glasgow Clinic | Hospital | 636 | Valley | 48 11 22 N | 106 38 08 W |
| Glasgow Family Chiropractic Clinic | Hospital | 638 | Valley | 48 11 37 N | 106 38 02 W |
| Glasgow Fire Department - North Side Fire Hall | Building | 662 | Valley | 48 11 43 N | 106 37 17 W |
| Glasgow Fire Department - South Side Fire Hall | Building | 637 | Valley | 48 11 34 N | 106 38 02 W |
| Glasgow High School | School | 692 | Valley | 48 12 14 N | 106 36 47 W |
| Glasgow Highland Cemetery | Cemetery | 682 | Valley | 48 12 04 N | 106 37 16 W |
| Glasgow Industrial Airport | Airport | 840 | Valley | 48 25 15 N | 106 31 41 W |
| Glasgow International Airport | Airport | 699 | Valley | 48 12 44 N | 106 36 55 W |