Is it possible for me to get into any Ivy League college?

My GCSE grades were a bit poor. Will this affect my chances?

...

Also will my past grades (GCSE), which weren't good, affect my probability of getting accepted?

I'm currently in Year 13 studying for my A levels.

My grades for AS Level were:

Maths- A
Physics- A
Biology- A
Geography- A
English Language- C

A Level predicted grades:

Maths- A*
Physics- A*
Biology- A
Further Maths (Self studying)- A

My GCSE grades were a bit poor. Will this affect my chances?

I got 2260 score on my SAT and I'm also doing Maths 2 and Physics.


For extracurriculars I:

- Involved in weekly debates and workshops about Astronomy and Physics where I applied these techniques and experiments to a small club I started in school. (I live in Portugal, so there aren't many opportunities for Astronomy)
- I am also a tutor for GCSE students since last year
- Did community services outside my country (Tanzania, Germany, India)
- Joined a football club, where I did competitions in England
- Wrote 3 articles on my blog although it didn't get very popular
- I took 4 online courses about Astrophysics and read a lot about this field (I was also part of 2 online clubs about Astronomy)

- I also like to play the piano, do martial arts, and I am learning C# as well as the violin on my free time.


I am extremely passionate about the field of Astrophysics and wished to become part of this study.
Are these extracurricular activities enough or do they require more leadership.

Also will my past grades (GCSE), which weren't good, affect my probability of getting accepted?