From my understanding game booster doesnt do anything you cant do yourself, which is just disable unneeded background processes while gaming. In general none of these "make your pc run faster" gimmicks, really do anything you cant simply do yourself with already included windows tools, defrag, disk clean up, use task manager to halt background processes etc. etc.
I doubt you will find many experienced gamers on Toms using such programs.
Its not about boosting your PC rather its about optimising it to play the game you are playing to the best of its ability.
Some programs like Tune Up Utilities have a Gaming mode but as already said that's doing little more than shutting down stuff you can disable yourself.
Also as said most of us tend to do a little more "Tweaking" than that.