There may have been OBITUARIES published.
They may show names and locations of other family members at the time.
Perhaps Gustval remarried?
LITKE, Gus; Looking Back; Camrose
LITKE, Gustaf & Elizabeth; Yesterday and Years Ago; Flagstaff
LITKE, Gustave; Strathcona County, A Brief History; Strathcona
REGISTRATION of DEATH /Long Form Death Certificate
Will show all personal information as required at the time.
Name,Age Date of birth - Names of parents including maiden name of the mother -etc
From Govt of Alberta Vital Statistics registry office
The cost aprox $40.