eidolon /ī-dōˈlon/

1. An image
2. A phantom or apparition
3. A confusing reflection or reflected image
4. An ideal or idealized person or thing

• the genuine article
• the ghost walks
• the gift of the gab
• the gimmes
• thegither
• the glorious Revolution
• the glorious Twelfth
• the gloves are off
• thegn
• the gnomes of Europe
• the gnomes of Zürich
• thegns
• the good
• the Good Book
• the goods
• the Good Shepherd
• the goose that lays the golden eggs
• the grand climacteric
• the grape
• the Great and the Good
• the Great Bear
• the Great Beyond
• the greatest
• the great unwashed
• the Greek calends