For the mirror universe counterpart, please see J. Gross (mirror).
J. Gross was a Starfleet officer in the 23rd century.
Gross was listed as a member of the Research and Development team on the dedication plaques of the USS Shenzhou and the USS Discovery. (DIS: "The Vulcan Hello", dedication plaque; DIS: "Context Is for Kings", dedication plaque)
This character was only mentioned in writing.
This officer was named after Julian Gross, who was an assistant to Alex Kurtzman.