Preconfigured Projects
Open World Server (OWS)
Open World Server (OWS) is a system for building MMO type games in UE4. The starter project for OWS has gameplay abilities pre-configured and contains some additional improvements to make gameplay abilities more user friendly. You can get a copy of it here:
ActionRPG
ActionRPG is a free mobile game project in the Epic Showcase marketplace. This project uses some of the Gameplay Abilities framework (single player).
Other Projects on GitHub
https://github.com/michaeltchapman/MCGameplayAbilities
https://github.com/Pantong51/GASContent