A member of Chief Engineer Montgomery Scott's engineering staff aboard the U.S.S. Enterprise in 2269. Gabler also doubled as a relief security guard; it was while serving in this capacity that Gabler and a security guard named Bell discovered Captain Kor's plan to destroy the Enterprise while the Klingons were ostensibly cooperating with the Federation starship's crew on stardate 5267.6 in a joint effort to escape from the spaceship graveyard inside the Delta Triangle (2269).