I don’t know if you know this but I thought I might inform you about this.
You can do teleport with Gouki to escape from corner situations, time and perform the teleport move to be done just as Gouki gets up from the corner. You can escape to the middle of the screen or even turn the situation and corner the opponent yourself, yes.
However, the handy trick that I wanted to mention is to simply teleport as aforementioned, but to teleport backwards, towards the corner, your opponent will most likely anticipate you to be ‘escaping’ the corner, not expecting you to simply remain where you are. As you teleport, his attack will not hit you, and you can use this opportunity to punish.