| Gardner, Rulon | Encyclopedia | Ryan Thorburn |
| Garrett, Edna, Growing up in Salt Creek, Wyo. | Oral Histories | Casper College Western History Center |
| Gas Hills Uranium Mining District | Field Trips | |
| George Lathrop memorial monument | Field Trips | |
| George, Big Nose | Encyclopedia | Lori Van Pelt |
| Geringer, Jim | Encyclopedia | Wyoming State Archives |
| Glendo Dam | Field Trips | |
| Glendo Dam, History of | Encyclopedia | The National Park Service |
| Goes-in-Lodge, Arapaho, with Ed Farlow and Tim McCoy on stage and screen | Encyclopedia | Rebecca Hein |
| Goodwin, Margaret, on Early Bighorn Basin Transportation | Oral Histories | Washakie Museum and Cultural Center |
| Goshen County Homesteader Museum | Field Trips | |
| Goshen County, Wyoming | Encyclopedia | Vickie Zimmer |
| Governors’ Mansion, Historic | Encyclopedia | WyomingHeritage.org |
| Governors’ Mansion, Historic | Field Trips | |
| Graf, Louise Spinner, 1950 jury foreman | Encyclopedia | Rebecca Hein |
| Graf, Louise Spinner, Jury Foreman and Green River Citizen | Oral Histories | Bill Barton |
| Grand Encampment Museum | Field Trips | |
| Grand Encampment Opera House | Field Trips | |
| Grand Teton National Park | Field Trips | |
| Grand Teton National Park, Establishment of | Encyclopedia | Annette Hein |
| Grand Teton, first ascent controversy surrounding | Encyclopedia | Raymond G. Jacquot |
| Granger Stage Station | Encyclopedia | WyomingHeritage.org, Wyoming State Historic Preservation Office |
| Granger Stage Station | Field Trips | |
| Grass Creek Oil Field | Encyclopedia | Rebecca Hein |
| Grattan Fight | Encyclopedia | Douglas R. Cubbison |
| Grattan Fight Monument | Field Trips | |
| Grattan Massacre | Encyclopedia | Douglas R. Cubbison |
| Grazing leases, federal | Encyclopedia | Russel L. Tanner |
| Great Divide Mountain Bike Route | Field Trips | |
| Green River Basin natural history | Encyclopedia | Emilene Ostlind |
| Green River Rendezvous | Field Trips | |
| Green River Valley Museum | Field Trips | |
| Green River, Wyoming | Encyclopedia | Terry A. Del Bene |
| Greybull Hotel | Encyclopedia | Stephanie Lowe |
| Greybull Hotel | Field Trips | |
| Greybull Museum | Field Trips | |
| Grindstone Butte | Encyclopedia | WyoHistory.org |
| Guernsey Dam | Field Trips | |
| Guernsey Dam, History of | Encyclopedia | The National Park Service |
| Guernsey State Park | Encyclopedia | WyomingHeritage.org, Wyoming State Historic Preservation Office |
| Guernsey State Park | Field Trips | |
| Guinard’s Bridge, North Platte River | Encyclopedia | WyoHistory.org |
| Hague, Arnold | Encyclopedia | John Clayton |
| Hale, William | Encyclopedia | Wyoming State Archives |
| Hamilton, Mel, former University of Wyoming football player on his life and the Black 14 | Oral Histories | Phil White |
| Ham’s Fork Crossing, Oregon/California Trail | Encyclopedia | Randy Brown |
| Hanna Basin Museum | Field Trips | |
| Hanna Mine Disasters, One Family’s Story | Encyclopedia | Tom Rea |
| Hanna Miners’ Monuments, war memorials and a steam locomotive | Field Trips | |
| Hanna, Wyoming | Encyclopedia | Nancy Anderson |
