I've started a profile on FS: https://www.familysearch.org/tree/person/vitals/GXXC-WXK
It looks like he was in New York until at least 1952...
In 1950 he was living in a rooming house in Brooklyn and working as a porter in an office building:
https://www.ancestry.com/discoveryui-content/view/282133113:62308
The 1950 census for New York isn't indexed on FamilySearch yet... but if you try this link
https://1950census.archives.gov/search/?state=NY&county=Kings&ed=24-501#.YqmxjmFVdUg.mailto
and search on 'Grotenhuls' (indexing error) you should find the page.
I could not find him in the 1930 or 1940 U.S. censuses, but perhaps he was missed if he was working on ships.