1) front left tire is losing tread on the side already replaced tire and again losing tread in same spot
2) service stability light flashes
3) car will serve a little to the left or right & trac light flashes
4) grinding noise coming from the front right side when I brake

I remember when I had my gtp the same noise end up being a hub.. My thought is that the wheel hub and wheel speed sensor needs replacement.

I know to check for the hub you need to get the tire off the ground and grab at 12-6 and see if there is play with the tire until I get sometime to lift the car am I in the right direction with problem

If your loosing thread in the same place then you need a alignment.

Everything you mention suggests you have an issue in the suspension/front end of the car. I'd have it all checked out, fixed up and get that alignment.

So a bad alignment could make the car slide which could result in the stability light flash?

Yep. A horribly bad alignment will cause your tires to lose traction very easily. I'd have it all checked out asap.