Remove all the special char from the string and convert it into char array and bind the grid.
Try this:
string s = "{ 'a', 'b', 'c', 'd' }";
string[] removeChar = { "{", "}", ",", "'" };
char [] GridData= s.Replace(",", "").Replace("{", "").Replace("}", "").Replace("'", "").Replace(" ", "").ToCharArray();
GridView1.DataSource = GridData;
GridView1.DataBind();
--Amit