To save ink,
I'll stop saying "on the left" and "on the right." If there are two names, the first one's on the left. If there's only one name, both photos are of that one rose.
I edited one of the posts above because I mistakenly identified Royal Amethyst as Blue Skies.
Garden Party is a hybrid tea and Geisha is a Pernetiana hybrid tea.
Gee Whiz is a Buck shrub rose.
General Gallieni, a climbing tea, was a tiny little plant (from Rogue Valley Roses) for four or five years. Last year it suddenly started growing and climbing up the Autumn Sunset next to it. They look great together.
Georgetown Tea is a tea rose and Gertrude Jekyll is an Austin shrub rose.
Givenchy is a hybrid tea and Gold Medal is a grandiflora.
Goldelse is a floribunda and Golden Zest is a shrub rose.
Grace is an Austin shrub and Gracie Allen is a floribunda.
Grand Siecle (more commonly known as Great Century) is a hybrid tea and Gruss an Aachen has been described by different sources as a hybrid tea, a floribunda, and a polyantha, but the current consensus is that it was the first floribunda.