That would be kind of cool, however ESET already offers automatic Gamer mode, which causes me not to have to look at it or adjust at all.
Yours must work differently than mine. My installation of ESET has a bad habit of engaging "Gamer Mode" when I'm not playing a game and I don't really want to deactivate notifications. This is why I prefer to switch the mode on or off manually, so yeah there's that. But you are right that automatic mode is offered...