| Cultivar Name | Plant Size | Leaf Color | Variegation | Var Color | Origin | Flower Color | Season | Source | Registered |
| 'Gazpacho' | Medium | Light-Green | Marginal | White | Hybrid | Pale-Lavender | June into July | Elslager, Ed | .2003 |
| 'German Sauerkraut' | - | - | - | - | Unknown | - | - | Jentsch, Klaus | --NR-- |
| 'Giantland Blue Cheese' | Medium | Blue/Green | Streaked | White | Hybrid | - | - | Miller, Jeff | --NR-- |
| 'Giantland Cup of Java' | Medium | Med-Green | Streaked | White | Sport | Pale-Lavender | July into August | Miller, Jeff | --NR-- |
| 'Giantland Mouse Cheese' | Miniature | Light-Green | - | - | Hybrid | Pale-Lavender | July into August | Miller, Terry & Meyer, Terry | .2011 |
| 'Gin and Tonic' | Large | Med-Green | Marginal | White | Hybrid | Near-White | July | Vaughn, Kevin | --NR-- |
| 'Gingerbread' | - | - | - | - | Duplicate | - | - | Duplicate Name | --NR-- |
| 'Gold High Fat Cream' | Large | Yellow | - | - | Sport | Pale-Lavender | July into August | Aden, Paul | --NR-- |
| 'Golden Crust' | Large | Med-Green | Marginal | Yellow | TC Sport | Pale-Lavender | July | Zilis, Mark | --NR-- |
| 'Golden Hawaiian Luau' | Medium | Yellow | - | - | Sport | Med-Lavender | August | Schwarz, Jim & Schwarz, Karen | --NR-- |
| 'Golden High Fat Cream' | - | - | - | - | Duplicate | - | - | Duplicate Name | --NR-- |
| 'Golden Honey' (Anderson) | - | Yellow | - | - | Unknown | - | - | Anderson, K. | --NR-- |
| 'Golden Honey' (Eric Smith) | - | Yellow | - | - | Unknown | - | - | Smith, Eric | --NR-- |
| 'Golden Honey' (Lewis) | - | Yellow | - | - | Unknown | - | - | Lewis, Alan | --NR-- |
| 'Golden Piecrust' | Large | Yellow | - | - | Sport | Pale-Lavender | July into August | Noffsinger, Coletta & Walek, Kevin & The American Hosta Society | .2000 |
| 'Golden Waffles' | Large | Yellow | - | - | Unknown | Pale-Lavender | June into July | Shaw, Florence | .1976 |
| 'Gooseberry Sundae' | Small | Med-Green | - | - | Sport | Med-Lavender | August to September | Philips, Hugo | --NR-- |
| 'Gosan Lettuce' | Medium | Light-Green | - | - | Hybrid | - | - | Schmid, W. George | --NR-- |
| 'Gosan Smoothie' | Medium | Med-Green | - | - | Unknown | - | - | Schmid, W. George | --NR-- |
| 'Grand Marbled Cream' | Medium | Dark-Green | Marginal | Yellow | Sport | Pale-Lavender | July | Elslager, Ed | --NR-- |
| 'Grand Marmalade' | Medium | Med-Green | Marginal | Creamy White | Sport | Pale-Lavender | July into August | Fransen, Marco & Owens, Clarence | --NR-- |
| 'Grand Slam' | Medium | Med-Green | - | - | Hybrid | Deep-Purple | August to October | Benedict, Dr Ralph (Herb) | .1990 |
| 'Grape Fizz' | Medium | Dark-Green | - | - | Hybrid | Light-Purple | July into August | Solberg, Robert | .2011 |
| 'Grape Knee Hi' | Large | Blue/Green | - | - | Unknown | - | - | Sisson, Kathie | --NR-- |
| 'Green Cheese' | Medium | Med-Green | - | - | TC Sport | - | July into August | Zilis, Mark | .2009 |
| 'Green Lime' | - | Yellow | - | - | Duplicate | - | - | Duplicate Name | --NR-- |
| 'Green Marmalade' | Large | Dark-Green | Streaked | Speckles | Hybrid | Pale-Lavender | August to October | Owens, Clarence | .1987 |
| 'Green Marmalade with Gold Edge' | Large | Med-Green | Marginal | Yellow | Unknown | - | - | Wade, Van | --NR-- |
| 'Green Olive' | Medium | Med-Green | - | - | Sport | Pale-Lavender | July | Schwarz, Jim | --NR-- |
| 'Greenhead Butterscotch Delight' | Miniature | Med-Green | Marginal | Yellow | Unknown | Pale-Lavender | August to September | Finke, Chuck | .2013 |
| 'Greenhead Golden Pineapple' | Medium | Yellow | - | - | Hybrid | - | June into July | Finke, Chuck | .2009 |
| 'Grey Goose' | Medium | Blue/Green | - | - | Unknown | Pale-Lavender | July | Smith, Eric & British Hosta and Hemerocallis Society | .1988 |
| 'Grey Poupon' | Small | Med-Green | - | - | Unknown | Pale-Lavender | June into July | Zumbar, Wm | .1995 |
| 'Guacamole' | Large | Light-Green | - | - | Sport | Pale-Lavender | August to October | Solberg, Robert | .1994 |
| 'Guacamole and Sour Cream' | Large | Med-Green | Streaked | Yellow | Unknown | - | - | Goodenough, Rick | --NR-- |
| 'Gum Drop' | Medium | Blue/Green | - | - | TC Sport | Pale-Lavender | June | Englerth, Lawrence & Ruh, Peter | .1987 |
| 'Gummy Bear' | Miniature | Med-Green | - | - | Unknown | - | July into August | Wade, Van | .1999 |
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