It means a device on the network asked the router to temporarily some ports up on the firewall via the Universal Plug And Play Protocol. Once it had finished with opening the ports it asked the router to close them again. I'm guessing that this was GTA opening ports for multiplayer game or sync to server. It looks like fore some reason it failed to remove the firewall rule when requested.
According to Rockstar games support site GTA V uses port 6672 on UDP protocol.