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| Company | Location | County | Certifications | License # |
|---|---|---|---|---|
| Gaaskjolen, Zachary | Piedmont, SD | — | Installer | — |
| Gaikowski, Kevin J | Watertown, SD | — | Installer | — |
| Geditz, Vince | Hermosa, SD | — | Installer | — |
| Geib, Braden | Belle Fourche, SD | — | Installer | — |
| George, Peyton | Rapid City, SD | — | Installer | — |
| Gerber, Daniel R | Lester, SD | — | Installer | — |
| Gerlach, Jamie | Rapid City, SD | — | Installer | — |
| Geveshausen, Jordan | Yankton, SD | — | Installer | — |
| Giersdorf, Brian | Deer River, SD | — | Installer | — |
| Gilles, Brandon | Union Center, SD | — | Installer | — |
| Good, Tyson | Pipestone, SD | — | Installer | — |
| Gosselin, Carl | Keystone, SD | — | Installer | — |
| Greslin, Michael D | Spearfish, SD | — | Installer | — |
| Gross, Garrett | Rapid City, SD | — | Installer | — |
| Grosz, Jamison | Armour, SD | — | Installer | — |
| Gunderson, Joseph | Gettysburg, SD | — | Installer | — |
| Gundrum, Kenneth | Viborg, SD | — | Installer | — |
| Guthrie, Kent R | Rapid City, SD | — | Installer | — |
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