For the mirror universe counterpart, please see C. Gebacz (mirror).
C. Gebacz was a Starfleet officer in the 23rd century.
Gebacz 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 Chloe Gebacz, who was assistant to Akiva Goldsman.