| Cultivar Name | Plant Size | Leaf Color | Variegation | Var Color | Origin | Flower Color | Season | Source | Registered |
| 'Gabriel's Gold' | Small | Light-Green | | | Unknown | Near-White | | Unknown | --NR-- |
| 'Gene's Joy' | Medium | Dark-Green | Medial | Yellow | Sport | Pale-Lavender | June into July | Zilis, Mark & The American Hosta Society | .2010 |
| 'George M. Dallas' | Large | Dark-Green | Marginal | Yellow | Hybrid | Med-Lavender | July into August | Beilstein, Doug & Zilis, Mark | .2009 |
| 'Georgia Sunrise' | Large | Yellow | - | - | Hybrid | Pale-Lavender | June into July | McDonell, Harold | .2014 |
| 'Georgie Porgie Puddin and Pie' | Large | Dark-Green | | - | Hybrid | Pale-Lavender | July | Kwick, Charles | .2020 |
| 'Ghost Tiara' | Medium | Light-Green | Marginal | Chartreuse | Sport | Light-Purple | July into August | Meyer, Bill | --NR-- |
| 'Giantland Dash of Love' | Large | Med-Green | Marginal | Yellow | Unknown | | | Miller, Jeff | --NR-- |
| 'Giantland Go Pack Go' | Medium | Med-Green | Marginal | Yellow | Unknown | - | - | Miller, Jeff | --NR-- |
| 'Giantland Lime-A-Rita' | Large | Med-Green | | | Nat-Sport | Light-Purple | June into July | Miller, Jeff | --NR-- |
| 'Giantland Mystic' | Medium | Blue/Green | - | - | Unknown | - | - | Miller, Jeff | --NR-- |
| 'Giantland Our Dutch Friend' | Large | Yellow | | | Unknown | Pure-White | | Miller, Jeff | --NR-- |
| 'Giantland Play it Forward' | Medium | Blue/Green | | | Unknown | | | Miller, Jeff | --NR-- |
| 'Giantland Truly an Honor' | Small | Blue/Green | | | Unknown | Near-White | | Miller, Jeff | --NR-- |
| 'Gigantor' | Giant | Med-Green | - | - | Unknown | Near-White | July into August | Fox, Bob & Fox, G. | .2019 |
| 'Gladiator' | Large | Med-Green | Marginal | Yellow | Sport | Light-Purple | July | Snyder, Ron | .2001 |
| 'Glen Lumenaria' | Large | Yellow | - | - | Unknown | - | August to September | Serafin, Viktoria | .2009 |
| 'Glorious Day' | Large | Med-Green | Streaked | White | Hybrid | Pale-Lavender | June | Unknown | |
| 'Gnarly Melon' | Large | Light-Green | | | Unknown | | | Burman, Dennis | --NR-- |
| 'Go Dorothy' | Medium | Blue/Green | Streaked | White | Hybrid | - | June into July | Benedict, Dr Ralph (Herb) & Kuenster, Rod | .2010 |
| 'Go-Go Mom' | Medium | Med-Green | Streaked | Yellow | Hybrid | Med-Lavender | June into July | Elslager, Ed | .2003 |
| 'Going for Gold' | Large | Light-Green | Marginal | Yellow | Sport | Pale-Lavender | July | Zilis, Mark | --NR-- |
| 'Gold Braid' | Medium | Light-Green | - | - | Hybrid | Med-Lavender | June into July | Seaver, Charles | .2004 |
| 'Gold Cover' | Small | Yellow | - | - | Unknown | Med-Lavender | July | Vaughn, Kevin | .1982 |
| 'Gold Pants' | Giant | Yellow-Gold | - | - | Hybrid | Pale-Lavender | July | Beilstein, Doug & Beilstein, Mardy | .2018 |
| 'Goldbrook Gratis' | Large | Med-Green | Marginal | White | Sport | Med-Lavender | July | Bond, Sandra | --NR-- |
| 'Golden Ballerina' | Medium | Yellow | - | - | Unknown | Light-Purple | June into July | Landis, Henry & Ruh, Peter | .1998 |
| 'Golden Dove' | Giant | Yellow | - | - | Unknown | Med-Lavender | June into July | Dove, Bill & Dove, Wanda | .2006 |
| 'Golden Hawk' | Medium | Light-Green | - | - | Hybrid | Pale-Lavender | August | Benedict, Dr Ralph (Herb) | .1984 |
| 'Good Lovin' | Miniature | Med-Green | Marginal | White | Sport | Light-Purple | July | Malloy, Alex | .2002 |
| 'Gotta Little Blues' | Medium | Blue/Green | - | - | Hybrid | - | - | Avent, Tony | --NR-- |
| 'GPS' | Large | Light-Green | | | Unknown | | | Kovacsik, Joanna | --NR-- |
| 'Grant Wood's Trail' | Medium | Med-Green | Medial | Yellow | Sport | - | July into August | Adams, Joy | .2010 |
| 'Great Western Gap' | Large | Med-Green | Marginal | White | Hybrid | Pale-Lavender | July into August | Kuenster, Rod | .2011 |
| 'Green Bag' | Medium | Med-Green | - | - | Sport | Med-Lavender | July into August | Heemskerk, Gerardus | .2014 |
| 'Green Goddess' | Large | Med-Green | | | Hybrid | Pale-Lavender | July into August | McDonell, Harold | .2021 |
| 'Green Milk' | Large | Med-Green | - | - | Sport | Near-White | July | Summers, Alex & Ruh, Peter | .2009 |
| 'Green Moon' | Large | Med-Green | - | - | Hybrid | Pale-Lavender | July | Wade, Van & Walek, Kevin | .2009 |
| 'Green Sleeve' | Medium | Med-Green | - | - | Sport | Pale-Lavender | July | Warmerdam, Piet | --NR-- |
| 'Green Whiskers' | Small | Med-Green | - | - | Unknown | - | June into July | Seaver, Mildred & Walek, Kevin | .2009 |
| 'Greenhead Badger Blue' | Large | Blue/Green | - | - | Hybrid | Pure-White | July into August | Finke, Chuck | .2009 |
| 'Grey Goose' | Medium | Blue/Green | - | - | Unknown | Pale-Lavender | July | Smith, Eric & British Hosta and Hemerocallis Society | .1988 |
| 'Gullivar' | Giant | Med-Green | - | - | Hybrid | Med-Lavender | June into July | Brown, Sandy | .2008 |
| 'Gunther' | Medium | Blue/Green | Streaked | Yellow | Hybrid | Near-White | July into August | Benedict, Dr Ralph (Herb) & Kuenster, Rod | .2010 |
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