NTalbot,

St. Lawrence State Hospital was a psychiatric facility.
https://www.asylumprojects.org/index.php/St._Lawrence_State_Hospital
If Gussie was there than I would assume it was for psychiatric reasons, and her passing away from bronchi-pneumonia was not the initial reason for her hospitalization.

Also, since Gussie married in 1912, if Louis was a citizen, or became a citizen by 1922, than Gussie would automatically acquire U.S. citizenship under her husband's papers.

Regards,

Sherri Bobish