A possible GTA 6 screenshot was published on Reddit. Although in fact it's just an unclear and blurry photo of the monitor that was taken in a dark room. The author claims it to be a screenshot of the alpha version of GTA 6. After a careful study of the provided picture, Reddit users noticed several interesting things.
In the lower left corner there is a minimap with indicators of health, armor, etc. This HUD looks like some combination of the HUDs of Red Dead Redemption, Red Dead Redemption 2 and GTA 4. It is consistent with the rumors that GTA 6 developers are using a temporary round radar, like in GTA 4.
On the right side of the minimap there is a floppy disk icon. Recent rumors stated that GTA 6 will be set in the 1980s in Vice City. Floppy disks were used for storing data at that time.
The screenshot features a passenger airliner. You can see the height scale on the minimap, which was also present in GTA 5 when the player was driving an aircraft. In the background and on the plane itself there are logos of various airlines. The same airlines could be seen in GTA: Vice City Stories, GTA 4 and even GTA 5 (e.g., FlyUS).
In the upper left corner there is a technical information, for instance, frame rate, RAM and CPU usage, some graphics settings.
Of course, this can also be a Photoshop fake. But, on the other hand, everything here seems plausible.