GA Tech chance of admission after invitation to interview

[anywhere]

I have recently been invited to Georgia Tech by the mechanical engineering department to tour and talk to some professors about assisting in research.  I know this is a good sign, but I am curious about my chances for acceptance at this point.  Does this mean I am close to admission? Or do I still have a ways to go?  And I was also wondering how many steps there are when trying to get a GRA/GTA position.  Would this only be the first round of interviews, or is this the only round?  Any info would be greatly appreciated!

[launchvehicle]

Hey, I received a similar email from Georgia Tech in mid December. A day after I received the invitation to visit, I received a preliminary acceptance email to the PhD program in AE. A week ago, I received a confirmation of my acceptance. I think that receiving the invitation to tour is a very good sign; I'm assuming the purpose of the visit is just to see which professor or lab is a good fit for you, as well as a way for professors to determine who they want to fund. Keep in mind that these are just my speculations and can be completely wrong, especially for a different department.