Coaching Staff,
Follow the steps outlined by GameChanger; when creating an account, you'll need to use the same email address you used with the GTLL site.
And it's that simple!
After following the steps outlined by GameChanger, your team will import to the app.

This feature will import player/schedule information into the mobile app.
Schedule and Roster updates made after the team import will automatically sync within the mobile app.
We hope you enjoy!