it looks your code will not work as expected, cause you have throw loop on each row with specific cell, it will result in only one value set in all cell. you need to change your code as follows
DGV.Rows(0).Cells(2).Value = "Boy"
DGV.Rows(1).Cells(2).Value = "Girl"
DGV.Rows(2).Cells(2).Value = "Boy"
DGV.Rows(3).Cells(2).Value = "Girl"
DGV.Rows(4).Cells(2).Value = "Girl"