Did he die or immigrate?

NYQVIST, Gustaf  Adolf Severin was born June 14, 1886 (parents Carl Oscar Johansson Nyqvist and Augusta Charlotta Fahlström) in Örgryte parish.  Carl died 19 February 1894 and Augusta 24 December 1895. Gustaf was first put in a poor house in Örgryte parish, then in a foster home in Forshälla from Feb 2 1898  to 13 Dec 1901 when he returned to Örgryte.  On 4 December 1909 he was listed in the Household Record of Örgryte BII:3 (1908-1913) Bild 141 as being moved to the Book of Missing Persons.  I could not find this book, a death record nor a immigration record.  Does anyone know what happened to him?