Hello Chris,
Alma appears on a few Border Crossings from Canada to the USA from 1914 - 1927
Alma Gunston. Born about 1876. England. Aged 38 years
Port of Arrival:   St Albans, Vermont, 13 th April 1914. Husband Frederick Gunston. Cambelville. Ontario.  Going to cousin Albert Edwards 870 16th Street Detroit. Michigan. Had $15.
In 1918 Alma Louise Gunston. Aged 43 years Born about 1875. England
Port of Arrival:   Niagara Falls, New York on 10 December 1918 - Arrival Contact was Mother Mary Meck  

 (next entry 1919 says friend)  and Departure Contact -  Father David Bunce. Moffatt. Ontario. Husband Frederick Wesley Gunston.
In 1919 Border Crossing Canada to USA - Alma Gunston. aged 43 years. Port of arrival - St Albans Vermont. Father David Bunce. Moffatt. Ontario. Going to a friend Mrs Mary Meek.  360 W 58th Street. New York. for 1 month.
In 1927  - Alma Louisa Gunston. Born Softlouse.   

 England. (probably means Lofthouse. England) 20 th June 1876.
Arrival Date:   21 Apr 1927
Port of Arrival:   Buffalo, New York, 21 April 1927 - Accompanied by:   Husband Frederick Wesley. Departure Contact Brother David Bunce.  Arrival Contact: Friend Mrs James Mckinnon. Locust Valley. Long Island. New York.
Alma L. GUNSTON 1876-1942 -  208316 Private Frederick W. GUNSTON - 97th Battn. C.E.F. died 27 Sept. 1947
Photograph of Alma and a few details on the link below
http://www.rootschat.com/links/0e73/ Frederick Wesley Gunston - Buried: Evergreen Cemetery, Milton, Trafalgar Conc. 2, Lots 12 & 13 FHL# 6094033 
Death Notice appeared in the Canadian Champion October 2, 1947 page 8, column 1
http://www.rootschat.com/links/0e74/