ALTHOUGH Sally walked to school every day, She still walks 30 minutes IN the gym.
Why did you capitalize "She?"
What is your question?
30 minutes should not be taken to get in the gym. She is capitalized.
The statement given is not clear as to what exactly you are trying to ask. However, based on the given information, it seems that Sally walks to school every day but also spends 30 minutes walking in the gym.
If you have a specific question related to this statement, please clarify, and I'll be happy to provide an answer.