Gettys Burger is a fast food restaurant and take-out service.
Gettys Burger is frequently used by the characters of Scandal. They serve freedom fries, union rings and a variety of burgers and sandwiches named for Civil War figures and other aspects of Americana from the era (for example, "Underground Railroad with Fries").
The restaurant becomes as a symbol for something regular Americans enjoy. On one of their first dates, David takes Susan to a Gettysburger after being surprised to learn that she had never visited one, since as a senator and then as vice president she had few opportunities to dine out like an everyday person. Later in the season, Olivia conceives Mellie Grant's disastrous visit to a Gettysburger, thinking it would help the senator connect with average voters.
Mellie is caught in a lie when she tells customers she visits Gettysburger every Sunday after church -- before they inform her that the chain is closed on Sundays, in recognition of the first Civil War battle, which was fought on a Sunday. (This is actually false -- the Battle of Fort Sumter began on a Friday, but ended on a Sunday. The First Battle of Bull Run, often mistaken for the first Civil War battle, did fall on a Sunday.)