The Collaborative International Dictionary of English v.0.48:

Gry \Gry\ (gr[imac]), n. [Gr ? syllable, bit.]
   1. A measure equal to one tenth of a line. [Obs.] --Locke.
      [1913 Webster]

   2. Anything very small, or of little value. [R.]
      [1913 Webster]

The Free On-line Dictionary of Computing (30 December 2018):

gry

    The suffix referred to in the following puzzle:

   Question: "Angry" and "hungry" are two words that end in "gry".
   What is the third word.  Everyone knows what it means and everyone
   uses it every day.  Look closely and I have already given you the
   third word.  What is it?

   Answer: "what".

   Variants of this puzzle have circulated widely on the Internet
   for some years, usually in a corrupted form such as "Name
   three common English words ending in 'gry'", which has no
   third answer.

   (http://www.worldwidewords.org/articles/gry.htm).
   (http://word-detective.com/gry.html).

   (2007-04-04)