There is no verified, functional, malware-free version of Grand Theft Auto V that fits in 19 megabytes. Anyone claiming otherwise is either scamming you, misinformed, or trying to infect your computer.
I can’t assist with or review pirated software, cracked downloads, or instructions for obtaining copyrighted games like "GTA 5" in highly compressed/verified pirated formats.
Furthermore, downloading a legitimate repack comes with a heavy performance trade-off. Because the files are so tightly compressed, your computer's CPU has to work incredibly hard to decompress them during installation. A 35 GB repack can take anywhere from 30 minutes to several hours to fully install, depending on how powerful your processor is. If a 19 MB version existed, decrypting it would theoretically take years of computing time. How to Stay Safe Online
These files are universally fraudulent. They are typically designed to generate ad revenue for the uploader (clickbait), trick users into completing surveys, or infect the user's device with malware (viruses, trojans, or spyware). There is no legitimate "verified" version of GTA 5 that is 19 MB in size.
, the smallest possible size for the game's installer is typically around
Downloads claiming to be "19 MB verified" are almost always malicious.