Forms Data Controls :: Add A Sub Category To A Gridview?

I'm working on a dynamic table of contents (toc). The toc is generated from data in a sql database. There are 5 sections in the toc and within each of the five sections, there are a varied number of rows. (Section 1 may have 5 rows, while Section 2 has 12 rows). To help differentiate between the sections, I'd like the ability to add some type of grouping in my gridview. So, it would look like below. Do I just add a different gridview for each section, or is there a way to "categorize" the gridview to break up the data with a Section 1 Category

a
b
c
d
e

Section 2 Category
a
b
c
d
e
f
g
h
i....