It does not add content to the game on its own. It is required by other mods (like Mowzie's Mobs or various animal/boss mods) to function correctly.
Place the .jar file into your Minecraft mods folder. geckolib-forge-1.19-3.1.39.jar
GeckoLib is a library mod that provides tools for developers to create complex 3D animations for entities, blocks, and items. It does not add content to the game on its own
geckolib-quilt-1.19-3.1. 39. jar * Dec 16, 2022. * 3.45 MB. * 1.19.2. * Quilt. CurseForge Modpack with plugins crashes - Aternos Community geckolib-forge-1.19-3.1.39.jar