Grand Theft Auto V has been released a long time ago now, and nothing has been said about a new entry in the series. Despite the lack of an official announcement, it seems like Grand Theft Auto 6 is indeed in development.
As discovered by GTA Forums Member ApolloThunder, 3D Game Artist Bibin Michael, who has worked with Rockstar Games from December 2017 until April 2018, revealed on his online resume that he created concept vehicles matching with real-world ones for the Grand Theft Auto Online as well as for the upcoming Grand Theft Auto 6.
This artist also contributed to Red Dead Redemption 2 in some capacity, as his name appears in the Thank You page on the game's official website, so he is indeed a former Rockstar Games employee, and the information on his resume is likely legit.
The latest game released by Rockstar Games is the already mentioned Red Dead Redemption 2. The game is one of the best open world games ever released, allowing players to fully live the outlaw life.
Red Dead Redemption 2 may not be perfect, but its minor shortcomings are like tiny blemishes on a stunningly beautiful face. In a way, they only serve as a reminder of how this world isn't made for perfection. Every single aspect of the game will put you into the very shoes of an outlaw roaming America with his gang as they try to escape the law long enough to make the money needed to disappear for good. It's an epic, memorable and engrossing tale which also elevates the open world genre to new heights with the brand new interaction system, a cast of unforgettable characters and a ton of high-quality content to play for a long time.