Do I need excellent GPA for applying the UWC?

Pre-College Issues International Baccalaureate (IB)
1

I’m a sophomore this year and I plan to apply for the UWC next year. Do I need to have all As to apply? Or what else excellent do I need for them to pick me?

2

Yes, and what kind of community service do they look for? I’m planning to apply this September for 2017-2019 at Pearson!