It was difficult to find secondary sources on the Gunther Brewing Company but here is some basic information that I found. The name of the Brewery before prohibition was originally called "Guenther" which probably meant that German immigrants founded the Brewery much like the American Brewery. The location of the Brewery is on 1211 South Conkling Street and is now used for cold food storage by the Tulkoff Family Partnership. I could not find an exact date when the Brewery was established but it appears it was sometime in the 1850's and produced beer up until 1976. The Brewery was bought out by Theodore Hamm in 1959 who owned a large Brewery in Minnesota and wanted to expand his business to the east coast. Hamm eliminated the original Gunther Brand which turned out to be a horrible business move because he lost many of Baltimore's loyal customers. Hamm didn't stay in Baltimore for very long and sold the brewery three years later to the F & M Schaefer Brewing Company. Schaefer reintroduced Gunther Beer back to Baltimore and regained former customers for quite some time after that. F & M Schaefer realized over time that is was too expensive to constantly maintain and upgrade older facilities like the one in Baltimore and decided to build a brand new modern brewery outside of Allentown, Pennsylvania. They then sold their property and operations in 1976 and beer there was no longer produced.
No Author Given, "Facts About... Gunther Brewing. Parcel 5, 'Ale, Pilsner, Stout Buildings' (Voluntary Cleanup Program)," Maryland Department of the Environment,
http://www.mde.state.md.us/assets/document/Gunther_Brewery_parcel_5.pdf (accessed December 8, 2009).
Anthony Pompa, "Gunther Brewing Company Baltimore, Maryland," Beer, Breweries, and Breweriana of Upstate New York,
http://heritage575.tripod.com/gunther_history.html(accessed December 8, 2009).
Will Anderson, "The F. and M. Schaefer Brewing Company," BeerHistory.com,
http://www.BeerHistory.com/library/holdings/schaefer_anderson.shtml (accessed December 9, 2009).