How Do You Get Misty To Go Back To Her Gym In Pokemon Soul Silver?

She is outside bills house where you can find suicune up the steps past 5 trainers

You find her outside bill's house up the stairs.

The place were her gym is there is a bridge in the Upper right corner go up the bridge  and then go right keep going and at the end you will se a house and stares go up the stares and there is misty I hope this helps
PS. You will need to beat 6 trainers to get to misty