Learn how to set up damage meta attributes and execution calculations in Unreal Engine’s Gameplay Ability System (GAS) to build a clean, scalable damage pipeline. This guide covers meta attributes, ExecCalcs, Set By Caller magnitudes, and passing calculated damage through the Gameplay Effect pipeline.
https://dev.epicgames.com/community/learning/tutorials/rL3l/unreal-engine-how-to-deal-damage-in-unreal-s-gas-meta-attribute-and-execution-calculation-pattern