Can't find a single mention of the Springfield Gazette in relation to Lincoln via Google, or at the Lincoln Museum site. Also can't find any evidence in searching, that the Springfield Gazette has ever existed. Certainly is suspicious.
http://www.mtpulaskiil.com/175th/175th-HistoryOfMtPulaski/Hi...
"A few years before, Mr. Lincoln had purchased the newspaper, The Springfield Gazette, which was a German-written newspaper that he had delivered to Mount Pulaski and other parts of central Illinois that had heavy German populations."
That said, I'm pretty sure this blog post is a piece of fiction. The "privacy controls" section is pretty telling IMHO.
I wonder if this more of a tribute to P.T. Barnum (the first subject mentioned in the article) than Abraham Lincoln.