Every Day Math Puzzles

I like doiing what's called "Every Day Math Puzzles" where a description of something with specific numbers is described with only the first letter of each word (except small prepositions and contractions a, at, in, on, the, of, etc) and the object is to solve what is being talked about. It can be a saying, from literature, science, everyday objects, music, sports, etc.

Example
7 = A W of the W
Seven = Ancient Wonders of the World

13 = D in a B D
8 = P in the S S (I U to be 9)

Anyway, I am stuck on this one:
7 = C on the G
any help?

That's it ! Thanks. Is there still 7 continents or is Eurasia considered a single continent?

Here are 2 more for people who like this sort of thing

88 = C. in the S.
1 = P. that’s W. a T. W.