| Cultivar Name | Plant Size | Leaf Color | Variegation | Var Color | Origin | Flower Color | Season | Source | Registered |
| 'Gaelic Roots' | Medium | Yellow | | | Unknown | | | Cumpson, J. Bruce | --NR-- |
| 'Gator Hide' | Large | Dark-Green | | | Unknown | Med-Lavender | July into August | Rawson, Don | --NR-- |
| 'Giantland Curly Toes' | Small | Yellow-Gold | - | - | Hybrid | - | - | Miller, Jeff | --NR-- |
| 'Giantland Tribble' | Small | Blue/Green | | | Unknown | | | Miller, Jeff | --NR-- |
| 'Giantland Twizzler' | Small | Blue/Green | | | Unknown | | | Miller, Jeff | --NR-- |
| 'Giantland Twizzler' | Small | Blue/Green | - | - | Unknown | - | - | Miller, Jeff | --NR-- |
| 'Glamour' | Medium | Dark-Green | Medial | White | Hybrid | - | June into July | Van Eechaute, Danny | .2008 |
| 'Golden Dwarf' | Small | Light-Green | - | - | Sport | Med-Lavender | August to September | Unknown | --NR-- |
| 'Golden Hypoleuca' | Medium | Yellow | - | - | Sport | Pale-Lavender | July into August | Unknown | --NR-- |
| 'Gonokami-no-sekirei' | Small | Med-Green | Streaked | White | Unknown | - | - | Gonokami, Ken-ichi | --NR-- |
| 'Gooseberry Sundae' | Small | Med-Green | - | - | Sport | Med-Lavender | August to September | Philips, Hugo | --NR-- |
| 'Gosan Golden Dwarf' | Small | Light-Green | - | - | Unknown | - | - | Schmid, W. George | --NR-- |
| 'Gosan Purple Line' | Medium | Dark-Green | - | - | Unknown | - | - | Schmid, W. George | --NR-- |
| 'Gosan Shining' | Medium | Med-Green | - | - | Unknown | - | - | Schmid, W. George | --NR-- |
| 'Gosan', H. takahashii | Medium | Dark-Green | - | - | Unknown | Light-Purple | August | Schmid, W. George | --NR-- |
| 'Grand Slam' | Medium | Med-Green | - | - | Hybrid | Deep-Purple | August to October | Benedict, Dr Ralph (Herb) | .1990 |
| 'Grandaddy Red Legs' | Medium | Dark-Green | - | - | Hybrid | Med-Lavender | August to September | Benedict, Dr Ralph (Herb) & Benedict, Dorothy & Kuenster, Rod | .2010 |
| 'Greased Pole' | Medium | Med-Green | - | - | Hybrid | Light-Purple | - | Moore, Jeff | --NR-- |
| 'Green Lava' | Large | Light-Green | - | - | Hybrid | Pale-Lavender | August to September | Schulz, Ed | .2015 .2018 |
| 'Green Sparkler' | Small | Med-Green | - | - | Sport | Med-Lavender | August to October | Zilis, Mark | .2010 |
| 'Green Wedge' (Aden) | Giant | Light-Green | - | - | Hybrid | Pale-Lavender | July into August | Shaw, Florence | .1976 |
| 'Greenest of Twenty' | Small | Med-Green | | - | Sport | - | - | Van Eechaute, Danny | --NR-- |
| 'Greenhead Grafton Blues' | Medium | Blue/Green | - | - | Hybrid | Pale-Lavender | August to September | Finke, Chuck | .2009 |
| 'Gretchen's Grace' | Medium | Blue/Green | - | - | Hybrid | Med-Lavender | - | Sisson, Kathie | --NR-- |
| 'Gretchen's Rainbow' | Large | Light-Green | Streaked | Yellow | Nat-Sport | Med-Lavender | | Van den Top, Jan | |
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