Gillanders came off the bench in the closing stages of the first half as the Baby Blacks triumphed 34-13 with tries from Kade Poki (2), Ryan Crotty, Wayne Ngaluafe and Zach Guildford. Fly-half Daniel Kirkpatrick added a penalty and two conversions, and full-back Israel Dagg a conversion.
Scrum-half Joe Simpson scored England's second-half try with full-back Alex Goode stroking over two penalties and a conversion in reply, but the result means England are now playing for fifth place.
Alex Goode (Saracens); Noah Cato (Saracens), Greg King (Worcester Warriors) (Tom Bedford, Exeter Chiefs 50), Alex Tait (Newcastle Falcons), Miles Benjamin (Worcester Warriors) (David Smith (Northampton Saints 55); Gareth Griffiths (Bristol Rugby), Joe Simpson (London Wasps); Nathan Catt (Bath Rugby), Scott Freer (Leeds Tykes) (Joe Williams, Cinderford 50), Alex Corbisiero (London Irish) (Billy Moss, Bath Rugby 61), Ben Thomas (Saracens), Scott Hobson (Cornish Pirates) (Gregor Gillanders, Leicester Tigers 36), Matt Cox (Worcester Warriors), Andy Saull (Saracens), Hugo Ellis (London Wasps, captain)
Replacements (not used)
Jack Steadman (Bristol Rugby), Danny Pointon (Northampton Saints), Richard Bolt (Exeter Chiefs), Adam Greendale (Leeds Tykes & Hymers College), Garth Dew (Sale Sharks), Jonathan Fisher (London Irish & Wellington College)
New Zealand U-19
Israel Dagg; Zach Guildford, Robert Fruean, Ryan Crotty, Kade Poki; Daniel Kirkpatrick, Wayne Ngaluafe; Rodney Ah You, Quentin MacDonald, Ben Afeaki, Chris Smith (captain), Samuel Whitelock, Peter Saili, Luke Braid, Liukanasi Manu
Ash Dixon, Paea Fa'anunu, Nicholas Barrett, Thomas Crowley, Josh Townsend, John Hardie, Matthew Cameron, Trent Renata, Winston Stanley, Jackson Willison, Sean Maitland