If you are referring to the Green Bay Packers helmet, then it stands for Green Bay.
Green Bay smarts.
It stands for "GREATNESS".
Greatness
Well it was nothing. They had nothing on it,it was just plain.
There are two meanings for the "G" on the helmet, Green Bay, but most importantly...... Greatness!
They have a trademark for that particular, stylized G. The letter G is still free for everyone to use.
I've heard two things, that it stands for Green Bay or for greatness.
Uhh . . . the word "green" starts with a G. As in Green Bay. You know, G for Green Bay? I hope this is clear enough.
The G stands for Green Bay. And the Green Bay Packers are owned by the city.
The following web site: www.packersuniform.com states that the now iconic "G" helmet logo was first used by the Packers in 1961 (designed by equipment manager Dad Braiser). The University of Georgia began using the "G" helmet logo in 1964. Grambling University (Louisiana) began using the "G" helmet logo in the early 1980's
G