Thanks for the question but it depends on the department and the institution at large. I would urge you to visit the school’s website and enquire or ask the Graduate Coordinator about it. They are always ready to share information to applicants. I hope this answer helps!
Nope, Esther. You can only apply for GA when you gain admission. However, you can enquire from the department to know whether they have GA opportunities before you apply. This will save you lots of money should you make up your mind to apply to many schools.