If you already own the game on PC, you can use the Steam Link app to stream it to your Android device over Wi-Fi.
If you want to play the actual GTA 5 on your Android device, you must use rather than a direct APK: Download Gta 5 Mobile Prologue Version On Android Apk
The only legal method to play real GTA V (including prologue) on an Android device is via : If you already own the game on PC,