GRE subject test is not needed in order to apply for the Fulbright scholarship program in Pakistan; even if you do take the subject test it will not help you in any way strengthen your application.
However certain programs in the US require this exam in addition to the GRE general test. In that case Fulbright will intimate you to take the GRE subject test but only after you are selected for the Fulbright scholarship. In such a scenario, it will be mandatory on you to take the GRE subject test.
Specifically from 2016, Fulbright will advise Computer Science and Engineering Candidates to take the GRE subject test if they get selected.
GRE Subject Test if offered in the following areas:
- Biochemistry, Cell and Molecular Biology
- Literature in English
To register for the GRE subject test for the Fulbright program and to learn more about it, please visit the ETS website.