I agree with Luis, but it depends on the context. French present tense can convey a lot more nuance than English present tense. Je vais can be both I go as in a regular routine - je vais a la fac (I go to the university) or j'y vais or je m'en vais can be I'm going as in I'm leaving, bye! Je vais aller usually expresses a future intention - I'm going to go, which could be linked to a condition (if I have the time - si j'ai le temps). Or maybe there is no condition and the intonation expresses firm resolution or commitment (je vais aller! - I've decided that I will go and nothing will stop me)