I'm another Gorsline and I live in WI. Will be happy to assist.
Viroqua is several hours from where I live, but I do get there about 1 - 2 times annually. Have access to statewide 1850 / 1860 census.
There was another post c 1988 on the Vernon Co site re: Sylvester Gorsline, s/o Sylvester Gorsline Sr.
My g grandfather had a brother named Sylvester.
It is possible this Gorsline was son or brother to Sylvester, who was known to be in Vernon Co?
Since you just discovered the name of your Gorsline, I doubt you have information further back on that line. If it does connect to the line that I descend from, I will be happy to share info. Have line traced back to Europe 1500's, and still working on that.
Gorsline is not that common a Surname, and if your Gorsline is connected to Sylvester, I strongly suspect a connection.
Melanie Gorsline Rice