| Cultivar Name | Plant Size | Leaf Color | Variegation | Var Color | Origin | Flower Color | Season | Source | Registered |
| 'Gabriel' | Large | Blue/Green | Streaked | Yellow | Unknown | - | - | Meyer, Bill | --NR-- |
| 'Gathering of Eagles' | Large | Blue/Green | Streaked | Yellow | Hybrid | - | - | Elslager, Ed | .2005 |
| 'Gay Blade' | Large | Blue/Green | Marginal | White | Hybrid | Pale-Lavender | August | Lachman, Wm & Lachman, Eleanor | .1988 |
| 'Generation X' | Large | Blue/Green | - | - | Unknown | - | - | Goodenough, Rick | --NR-- |
| 'Genesee Genco' | Small | Med-Green | - | - | Unknown | Light-Purple | July into August | Brandt-Sorheim, Peter | .2000 |
| 'Genghis Khan' | Medium | Yellow | Marginal | Yellow | Unknown | Light-Purple | July | Janssen, Bill | --NR-- |
| 'Gentlemen Prefer Blondes' | Large | Yellow | Marginal | White | Sport | - | - | Malloy, Alex | --NR-- |
| 'Ghost Story' | Medium | Med-Green | - | - | Unknown | - | - | Carlson, Monty & Carlson, Julie & Moore, Jeff | --NR-- |
| 'Ghostface' | Medium | Med-Green | Marginal | Yellow | Sport | Pale-Lavender | July into August | Asch, Stuart | .2000 |
| 'Giantland Flubber' | Giant | Med-Green | | | Unknown | | | Miller, Jeff | --NR-- |
| 'Giantland Love Under the Stars' | Medium | Blue/Green | - | - | Sport | - | - | Miller, Jeff | --NR-- |
| 'Giantland Megalodon' | Giant | Med-Green | - | - | Unknown | - | - | Miller, Jeff | --NR-- |
| 'Giantland Pay it Forward' | Large | Blue/Green | - | - | Unknown | - | - | Miller, Jeff | --NR-- |
| 'Giantland Thor' | Giant | Blue/Green | - | - | Unknown | - | - | Miller, Jeff | --NR-- |
| 'Gilda' | Medium | Light-Green | - | - | Hybrid | Pure-White | August | Benedict, Dr Ralph (Herb) | --NR-- |
| 'Gladiator' | Large | Med-Green | Marginal | Yellow | Sport | Light-Purple | July | Snyder, Ron | .2001 |
| 'Glitter' | Large | Blue/Green | - | - | Sport | Near-White | July | Van Eechaute, Danny | --NR-- |
| 'Go for Broke' | Small | Med-Green | Marginal | White | Unknown | Med-Lavender | July into August | Stevens, Don & Malloy, Alex | .2000 |
| 'Godzilla' | Large | Blue/Green | - | - | Hybrid | Pale-Lavender | July | Ward, Dr Dick & Ward, Jane | .1996 |
| 'Going My Way' | Medium | Med-Green | Streaked | White | Unknown | - | - | Livingston, Ron | --NR-- |
| 'Golden Boy' | Small | Yellow | - | - | Unknown | Near-White | - | Aden, Paul | --NR-- |
| 'Golden Eye' | Small | Yellow | - | - | Sport | Deep-Purple | July into August | Van Eechaute, Danny | --NR-- |
| 'Golden Globe' | - | - | - | - | Hybrid | - | - | Unknown | --NR-- |
| 'Golden Great Expectations' | Medium | Yellow | - | - | TC Sport | Near-White | June into July | Zilis, Mark | --NR-- |
| 'Golden Needles' | Small | Yellow | Streaked | Green | TC Sport | Deep-Purple | July into August | Walters Gardens | .2012 |
| 'Goldeneye' | Large | Dark-Green | Streaked | Speckles | Hybrid | Med-Lavender | July | Elslager, Ed | .2000 |
| 'Goldfinch' | Miniature | Yellow | Marginal | White | Hybrid | Med-Lavender | July | Johnson, Greg | .2004 |
| 'Goldfinger' | Miniature | Yellow | - | - | Unknown | Deep-Purple | August | Zumbar, Wm & Walek, Kevin | .2009 |
| 'Goldfish' | Small | Yellow | - | - | Nat-Sport | - | - | Russo, Dave | --NR-- |
| 'Gone Fishin' | Large | Blue/Green | Streaked | Speckles | Sport | Near-White | June into July | Zilis, Mark | --NR-- |
| 'Gone with the Wind' | Large | Dark-Green | Marginal | White | Hybrid | - | - | Petryszyn, Olga | .2009 |
| 'Good As Gold' | Large | Yellow | - | - | Hybrid | Pale-Lavender | July | Unknown & Ruh, Peter | .2010 |
| 'Gotham' | Giant | Blue/Green | - | - | Hybrid | - | July | Petryszyn, Olga | .2009 |
| 'Graceland' | Medium | Dark-Green | Marginal | Green | Hybrid | Pale-Lavender | June into July | Jones, Leonard | .2006 |
| 'Grand Prix' | Small | Light-Green | - | - | Unknown | - | July into August | Ward, Dr Dick & Ward, Jane | .2009 |
| 'Greased Lightning' | Large | Yellow | Marginal | Yellow | Sport | Near-White | July | Kuk, Bob | .2005 |
| 'Great Balls of Fire' | Medium | Blue/Green | Streaked | Yellow | Sport | Near-White | July | Elchuk, Kevin & Elchuk, Olga | .2012 |
| 'Great Escape' | Medium | Dark-Green | Marginal | White | Sport | Pale-Lavender | July | Van den Top, Jan | .2006 |
| 'Great Expectations' | Medium | Blue/Green | Medial | Yellow | Sport | Pure-White | June into July | Bond, John & Aden, Paul | .1988 |
| 'Green Beret' | Medium | Dark-Green | - | - | Sport | Med-Lavender | July into August | Snyder, Ron | .2002 |
| 'Green Fingers' | Miniature | Dark-Green | - | - | Hybrid | Light-Purple | August | Owens, Clarence | .2002 |
| 'Green Gables' | Large | Med-Green | - | - | Sport | Pale-Lavender | July into August | Walters Gardens | .1997 |
| 'Green Harvest' | Small | Med-Green | Streaked | White | Sport | Light-Purple | July | Malloy, Alex | --NR-- |
| 'Green Hornet' | Medium | Med-Green | - | - | Sport | Pale-Lavender | July | Malloy, Alex | --NR-- |
| 'Green Ice' | Medium | Dark-Green | - | - | Sport | Pale-Lavender | July | Wade, Van | --NR-- |
| 'Green Lantern' | Medium | Dark-Green | - | - | Unknown | Pale-Lavender | June | O'Harra, Russ & Riehl, Frank | .1993 |
| 'Green Pastures' | Small | Light-Green | - | - | Hybrid | Near-White | June into July | Ward, Dr Dick & Ward, Jane | .2010 |
| 'Green Sand Pebbles' | Medium | Med-Green | - | - | Sport | Pale-Lavender | July | O'Brien, John | --NR-- |
| 'Green With Envy' | Medium | Yellow | Marginal | Dark Green | Sport | Light-Purple | June into July | Bond, Sandra | .2000 |
| 'Greybeard' | Large | Blue/Green | Marginal | Yellow | Hybrid | Pale-Lavender | July into August | Carlson, Monty & Carlson, Julie | .2013 |
| 'Gypsy Rose' | Medium | Dark-Green | Medial | Yellow | TC Sport | Pale-Lavender | July | Anderson, Jim | .2003 |
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