Really, So what?
The Confederates lost almost as many men as the Union did; their offensive into Pennsylvania was stopped, and Lee essentially had another tactical victory at a time he needed a crushing strategy victory.
Lincoln had the guts to call Lee's withdrawal from Pennsylvania a victory in its own right and had a famous address there afterward.
The Union winning at Gettysburg, ultimately, is like the Union winning in the Peninsula campaign-it would make the war go faster with less loss of life, but the outcome is essentially known.
George Meade gets removed from command in favor of US Grant, he then kicks Lee around in 1864 before cleaning up the remainder. It helps that the Democrats can't be bothered to campaign competently in 1864--Vallandigham as Secretary of War for a Pro-War McClellan?
Lee is still running out of men; the Confederate States are cut in half, the Democrat opposition to the war is disjointed and unable to Campaign well. Lincoln won in OTL because his party tapped pro-war democrats for the election as a "Union" Party. Give the Union a victory instead of a tactical defeat at Gettysburg and Lincoln wins more handedly.
OOC: Did you read the OP? You have a lot of problems understanding DBWI's, don't you?![]()
He was merely trying to breath some new life into a very old, very tired What If?...
Well, although the Confederate victory at Gettysburg was very important from a military point of view (inflicting a severe defeat upon the Union Army and keeping the war out of Virginia for many months), the main benefit to the Confederacy was diplomatic.
Without the victory at Gettysburg, I highly doubt that the Roebuck Resolution recognizing the Confederacy as an independent nation would have passed the House of Commons. Obviously, then, we would not have had the mediation of the conflict by the British, and the signing of the treaty of peace on December 31, 1863.
Honestly, if the Union had won at Gettysburg, I cannot see the Confederates winning independence.