Direct PhD at NUS/NTU in Nanotech/Materials Engg

I am a Btech 2nd year student and want to pursue a direct PhD if possible at NUS/NTU. What are my chances considerinf the fact that I will get 2-3 publications till my fourth year. I have a strong research background. Good Reco Letters. Currently interning at IIT Bombay. I have presented posters at 4 international conferences till date.

What are my chances and can I apply through gate?

THanks,
Regards.