Dear Student,

Yes,You can select  or fill the choice of preference based upon your rank among NITs,IIITs or GFIT's simultaneously.You need to fill it carefully by considering your branch and college among these three which you want in hirearchy order i.e your first preference then second preference and so on.You will be allocated seat if your rank is good and seats are available for first preference if not then your second preference will be counted if seats are available for this then you will get if not then 3rd preference will consider and so on.You need to fill in such a way that your priority will be first higher and then decreasing by analyze your rank in which college you can get the seat and desired branch.

Hope it is helpful