Significantly less than the standard 4.7 GB full retail installation. How to Install
Because it is a highly compressed version of a legacy title, it runs comfortably on most low-end hardware:
It includes custom patches to address long-standing bugs, such as the "King in Exile" glitch and crashes near the San Fierro docks.
For those seeking the most stable and official experience, the game is also available through the Rockstar Games Launcher as part of the Grand Theft Auto: The Trilogy – The Definitive Edition . 100% Comp- By Golden Pen - GTASnP.com
For modern laptops or monitors, you may need to manually adjust the display settings to 1920x1080 or your native resolution via the in-game options menu.