Gabara's roars sound like mocking laughter. These roars would later be sped up for the Ultra Series kaiju Muruchi and slightly modified for Yadokarin, Femigon and Kyasshi. In Go! Godman, he uses roars which would go on to be shared by the monster Tyrant. When Godzilla stomps on Gabara's chest in All Monsters Attack, he emits a chattering noise that was also used for a monkey in episode 44 of Ultraseven. In Godzilla: Monsters & Protectors - All Hail the King!, his roar is written as "SKRAAAWW."
https://www.youtube.com/watch?v=mQ52Pk_UwEg
