| Topic | Relevant Location | Description. |
| Gabo Island | NSW/VIC | The Telegraph Station. |
| The telegraph line to Gabo Island. | ||
| The death of Mr. Charles Kebby by neglect. | ||
| Germany | William Robinson and son Charles introduced the Morse system in 1847. | |
| Germans | New South Wales | German support for flood victims in the widespread 1867 floods - including at Albury Charles Kraegen. |
| Geology | Western Australia | Goezel's theory to the effect that the WA portion of the continent presents the bottom of an ancient ocean bed |
| Gibbs, May | Western Australia | Author of childrens' literature (Snugglepot & Cuddlepie, Banksia Men, etc) - lived at Harvey. |
| Gin ordered for Greenponds | Tasmania | Orders for cases of Gin by Mr. W. Harvey. |
| Gold finds | New South Wales | Gold around Silverton and Broken Hill. |
| Australia | Australian Gold Rushes in Wikipedia | |
| Grave | Overland Telegraph Line | Mr. Charles Kraegen - died on the OLT after an illustrious telegraph career. |
| Western Australia | Ms. Mary Helen Cuper- outstanding capable leader. | |
| Western Australia | Digging his own grave near the telegraph line from Dundas to Balladonia. | |
| Greenhouse ideas | General | 1884 Newspaper Article - ahead of its time by 140 years. |
| Guarantee for telegraph offices | NSW and Victoria | The guaranteed contribution from a community for costs to be met for a new telegraph line and office. |
| Gutta Percha | Cables | Description of the covering and its properties. |