I saw there such topic, but it was so long time ago, in 2014. How about think about It again? Because with your base, knowledges and experience you could make the best alternative (unofficial) multiplayer (client/server) for GTA V as well make it easier for developers to create their own gaming modes (with your tools based on lua scripting). I just hope that maybe you'll think about it, because gta v worth our attention even more than gta sa due to the huge map and incredible graphic features.