How to get working GameGem on iOS 11.3.1 (Jailbreak)

Step 1 Download: Newterm 2 from https://cydia.kiiimo.org

Step 2 login: su
Step 3 password: alpine
Step 4 command: killall GameGemNative && GameGemNative
Step 5 Download: GameGem
Step 6 Watch this tutorial video