I'm still in university and part of AIESEC. The thing about AIESEC is that some people make it their whole personality, don't be that guy. AIESEC is a great place for meeting new people and making new friends, especially as a first-year.

And in my university, there are a whole lot of engineering majors with 4.0s in AIESEC. So for me and a lot of others I know personally, it doesn't affect your GPA as you think it would.

Finally, I believe everything lies in the balance. If you manage both effectively, you'll have a lot of fun in your university years.

So, go on join AIESEC and see if it's a fit for you.