A default profile for the ATR will come in this weekend update.
However, we can't fully support the ATR without some help from the developer, because some things like the door automation events or the fuel system can't be figured out easily, because the airplane is encrypted, but I already contacted Hans and he's surely willing to help, since he has a long history of supporting GSX, so as soon I get the relevant info, a proper profile will be out. Also, we are planning some key improvements in GSX that are specifically related to airplanes like the ATR, they will come later, but it will help with other future airplanes that might come, like the Q400, etc.