As you asking I am telling you GRE essay topics on the Issue task seem to come such a variety of different fields that there seems to be little discernible, there are, several categories, for make GRE essay such as like:

Education (with a great degree of emphasis on college)
Technology and society
Metro Cities
Government and Power
Intellectual Endeavors
Philosophical
Art:

The use of colour in graphical displays

Business


Education

Standardized testing in the schools
Joining fraternity

Family

Independence from parents
Multi-cultural family
Moving away to college
Adoption
Adaptation to parent's divorce
Birth of brother
Birth of niece
Sister moving out
Constant moving as child
Medical

The evidence for HIV as a cause of AIDS
The cancer risk of second-hand smoke
Undergoing surgery
Personal

Senior year in high school
Experimenting with drugs
High school graduation
Moving from house you grew up in
Relationship with Mom
Having a Twin
Best Friend
Death of close friend
Growing up in small town
Describe your favorite vacation spot. Use at least three of the five senses (taste, touch, sound, sight, smell) in your description.