Unfortunately I don't have any information on this Gilbert Larson, but I'd be interested to learn what you find out as he would be a distant cousin.
His parents (Lars Gilbertson Haselhaugen and Ragnhild Gudbrandsdatter) each had a sibling that also married, resulting in "double cousins". That couple was Lars Gudbrandsen Finneplassen (brother to Ragnhild Gudbrandsdatter) and Randi Amundstua (sister to Lars Gilbertson Haselhaugen). They had 7 children and 6 of the 7 immigrated to Barron County as well. Most took the surname of LOUIS.
The oldest son in this family was Gilbert Louis, born 18 December 1851, and who married Mary Nordhagen, which means you have double cousins named Gilbert Larson/Louis both born in 1851 and both married to a woman named Mary living in the same general area! The other children were: Olina (Larson) Severson b. 1854, Gunhild (Louis) Olson b. 1858, Kristina (Louis) Krans b. 1860 [she is my great-great-grandmother], Rasmus 'Ross' Louis b. 1862, and Johan Louis b. 1863. The sibling who remained in Norway was Ronnaug (Gulbrandsdatter) Haugerudbraten b. 1855.
I would be interested in exchanging information and getting a copy of the obituary you have for Mrs. Ragnhild Haselhaugen. I have a copy of her death certificate and photos of her and her husband's grave markers if you're interested, as well as those of some of the Wintrone family you mentioned. My e-mail is email@example.com
. Thanks and good luck!