The history is not perfectly clear, but the link below provides the official explanation by the Republican Party.
The Republican Party of the United States is known as the Grand Old Party.
It is also called GOP (Grand Old Party).
G.O.P. (Grand Old Party) refers to the Republican political party.
it mean grand old party!
National Union Party
Although GOP does stand for Grand Old Party, it only refers to the Republican Party not the Democratic Party.
The Republican Party of the United States is known as the Grand Old Party.
GOP means the "Grand Old Party" or as almost everyone calls it the "Republican Party"
The Republican Party is also known as the Grand Old Party (GOP).
GOP which at first may have stood for "Gallant Old Party" but now stands for "Grand Old Party" has been used since the 1876 Convention in Cincinnati if not before.
The Grand Old Party or GOP
Grand Old Party Gallup Opinion PollGrand old Party
An old term used to refer to an evening party is "soiree".
The Grand old Party or GOP
Grand Old Party
grand old party
grand old party