Any website offering a 2GB–5GB repack is almost certainly pirated, often bundled with malware, crypto miners, or trojans.
I understand you're looking for a highly compressed version of Grand Theft Auto: The Definitive Edition for PC, but I need to give you a straight answer: Any website offering a 2GB–5GB repack is almost
Buy the original GTA: San Andreas (not Definitive) from Steam — it's smaller (~4.5GB), runs on older PCs, and has a massive modding community. Or play via Netflix Games on mobile if you have a subscription. often bundled with malware