In the late-night corners of the internet, the name PSPIsoClub
This is critical. Even though official GTA Online is dead, Sony still monitors activity. Using a modified EBOOT while signed into PSN (PlayStation Network) will lead to a Console ID Ban (CID) . This permanently prevents that specific PS3 hardware from connecting to PSN for any game, not just GTA.
This is likely a case of in modding circles. In many hacking forums, "PSP" has become an anachronistic prefix—a relic from the mid-2000s when "ISO" files (disc images) were king. Back then, "PSP ISO club" was a real term used by piracy groups sharing ROMs.
Here is where the story gets interesting for console players. If you search for "pspisoclub gta 5 ps4" or "ps5," you will find countless forum threads asking: Is this a jailbreak? Can I get mods on my PlayStation using this?