A: Yes, if downloaded from the official FitGirl site. However, even that is piracy. But technically, it works and is virus-free.
Most files advertised as "1GB Highly Compressed" are unfortunately fraudulent and pose serious risks: Malware and Viruses gta 5 highly compressed 1gb for pc
Warning: Even this repack is copyrighted. Downloading it may violate your local laws. A: Yes, if downloaded from the official FitGirl site