It is highly compressed in 3 mb but after extracting original file size is 1.2gb it is 100 percent working n tested by me
Instructions :
Use z archiver or b1 archiver only
Install APK
extract rar
Copy 'com.rockstar.gta3' folder to 'sdcard/Android/obb'
Launch the Game
Download link
Https://www.sendspace.com/file/v92drv
download apk version 1.3 or1.4 from google play or any other links.
Enjoy n if u face problems reply here

pass:gta3