GTA and GTA 2 are the top-down classics of the series that were playable on the original PlayStation. They have now been rated for PlayStation 3, which is either an error or a potential indicator we might see them revived on next-gen consoels.
PlayStation 5 is all about that speed provided by the superior SSD to curb the loading time on demanding games, complemented by strong hardware allowing for better frame rates and resolutions but we might be looking at some retro additions via backwards compatibility. Sony didn't officially state anything about this yet so keep in mind that this theory might turn out to be a stretch.
Classic GTA titles, the first two with the top-down perspective, have been rated by PEGI for PlayStation 3. Considering that PS3 will be two generations old by the end of 2020, it doesn't make much sense for Rockstar to bother with releasing the games on a platform barely anyone uses anymore.
While PS5's backwards compatibility with PS3 and older Sony consoles has been called into question, the company never explicitly stated it will not be a thing. Microsoft is already enjoying the extra points for making the Xbox Series X capable of running all previous Xbox generations' games so it is possible Sony will refuse to give up on this selling point.
Therefore, it is still possible Sony are looking to give their fans more backwards compatibility options, some of which may turn out to be Rockstar's classic titles. Keep in mind that the rating could turn out to be a clerical error and Rockstar have something else in mind with these games.
In case you are wondering what the ratings for the classic GTAs were, the original is rated 16+ while GTA 2 is 18+ due to gratuitous amounts of violence as well as foul language and overall bad habits depicted in the games.