Name, year of 1916 and country of birth, from Brian of nzolivers.com, from search results in June 2017 of official BDM Historical Records showing children born in New Zealand to Ernest Lewes Gates and Sarah Selina Gates (nee Burch).

Full date of birth and death, place of burial, name of wife Audrey Phyllis Gates (no maiden name) from billiongraves.com website for Greytown Cemetery, found by Brian Oliver of nzolivers.com in June 2017.

From the 1946 Wairarapa Electoral Roll:
Gates, Kenneth Herbert, Jelliene Street, Greytown, farmer
Gates, Audrey Phyllis, Jellicoe Street, Martinborough, married

From the 1949 Wairarapa Electoral Roll:
Gates, Kenneth Herbert, Jelliene Street, Greytown, farmer
Gates, Audrey Phylliss, Jellicoe Street, Greytown, married

Result from birth search on New Zealand BDM website in May 2021:
Registered 1916/8941. Gates, Kenneth Herbert. Mother: Sarah Selina. Father: Ernest Lewis

Full date of birth of 16 December 1915 (note different year) from further searching in May 2021 on BDM Search by incrementally changing the date range for the birth.

Year and country of marriage from search on New Zealand BDM website in May 2021:
1940/8689. Bride: Audrey Phyllis Olson. Groom: Kenneth Herbert Gates

Full date of marriage of 12 June 1940 from further searching in May 2021 on BDM Search by incrementally changing the date range for the marriage.