1930, Brooklyn, NY
indexed as GURTRD
https://www.familysearch.org/ark:/61903/3:1:33S7-9RZ5-ZL?i=12&cc=1810731&personaUrl=%2Fark%3A%2F61903%2F1%3A1%3AX4VS-965
That man was born in 1888 and previously married, about 1907. Could he be this Arthur, whose wife was named Alphonsine Bailey, and not the man who was naturalized in Michigan in 1927?
I don't know, just stating it as a possibilty.
1911 in Montreal
https://www.familysearch.org/ark:/61903/1:1:QVBC-CGVS1920 in Lawrence, Massachusetts with Bailly in-laws in the household
https://www.familysearch.org/ark:/61903/1:1:MXYN-HWR1930, Alphonsine in Boston, Massachusetts, on her own, but "married" and with her parents in the household
https://www.familysearch.org/ark:/61903/1:1:XQR3-1ZH----------
looking for Robert Richard Guitard's birth:
Massachusetts birth index, 1926 to 1930, 1931 to 1935
no Guitard or Gutard or Gurtard or Gitard
but:
Surette, male, 1929 Malden, Vol 61 page 554
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looking for Arthur Guitard and Eva Surette's marriage:
Massachusetts Marriage Index, 1926 to 1930
no Eva Surette
no Guitard or Gurtard or Gutard or Gitard
no Arthur Guittarr
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And for the Detroit man, whether the same or otherwise:
1927 Detroit City Directory
Arthur Guitard, electrician, 2387 East Grand Blvd
Bert Guitard at 3105 East Jefferson Blvd [the address on his naturalization
1930 - 1932 Detroit City Directory
no Arthur. Bert stayed in Detroit.