Statistics for occurrence #1 of “Gettysburg” in chapter 6 of The Photographic History of The Civil War: in ten volumes, Thousands of Scenes Photographed 1861-65, with Text by many Special Authorities, Volume 10: The Armies and the Leaders.:

...th New York. Twelfth Massachusetts, First Delaware, and other regiments; at Stone's River, December 31, 1862, by the Eighteenth United States Infantry, Twenty-Second Illinois, and other regiments; at Gettysburg , by the Twenty-Fourth Michigan, one hundred and eleventh New York, First Minnesota, one hundred and Twenty-sixth New York, and one hundred and fifty-first Pennsylvania, were all suffered while the Fe...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Gettysburg (Pennsylvania, United States) 7,452 188 1,368 2 0 user votes
Gettysburg (South Carolina, United States) 0 0 0 0 0 user votes
Gettysburg (South Dakota, United States) 0 0 0 0 0 user votes

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