I've just found the method to solve the 'invalid licence' problem in Gameloft games..
Method-> (example->six guns)
(consider you have downloaded apk as well as sd data already)
1.open play store, and start the downloading of six guns.
2.after 100-200kb downloaded, stop the download.
3.then copy the previously downloaded data to android/obb
and overwrite it.
4. after that install the previously downloaded apk.
5.run the game.it will require Internet connection first time.
6.it will verify the files and the game will be started..
I'm a newbie so forgive me for my mistakes...