May I ask what exactly you mean with "all information"? That it covers the entire battle, the lead-up to it as well as the retreat? (By the way, Gettysburg was fought on 3 days, not just 1.)
Stephen W. Sears "Gettysburg" starts in May 1863 when Lee comes to Richmond and ends with Lee's return to Virginian soil. The epilogue covers the aftermath in Gettysburg, up to Lincoln's Gettysburg Address in November 1863. I found this book to be comprehensive and well-written.
Bradley M. Gottfried "The Maps of Gettysburg" start beginning of June 1863 when the Army of Northern Virginia takes off north toward Pennsylvania and ends with Lee's return to Virginian soil. As the book title suggests, the book has lots of maps showing the action, not only describing it and placing one or two handful maps in-between. That way, troop movements and positions become clearly visible. The maps also include the actions in the Shenandoah Valley (Second Winchester). I really like the book for the maps, but the text is a little too dry for me so it's dragging (I haven't progressed beyond the fight for McPherson's Ridge in the afternoon of Day 1). It might be the one for you though, depending on what you're looking for.
Edwin B. Coddington "The Gettysburg Campaign: A Study in Command" starts around Chancellorsville in April 1863 and ends with Lee's return to Virginian soil. I haven't read the book yet so can't compare it to Sears' "Gettysburg".
Hope that helps!