get user selected checkboxes from gridview c#

i have few survey question in my gridview,user can select one selection only for each question.I have difficulty in getting user selection in c#,please guide me on this thanks.. i want to have output something like this after i click submit button:

1. checkP
2. checkG
3. checkG
4. checkG
5. checkP


 protected void Page_Load(object sender, EventArgs e)
{
    DataTable question_x = new DataTable("Question");
    question_x.Columns.Add(new DataColumn("ID", System.Type.GetType("System.UInt64")));
    question_x.Columns.Add(new DataColumn("Name"));
    question_x.Rows.Add(1, "1) Training deliver can be understood?");
    question_x.Rows.Add(1, "2) The way instructor deliver the training is satisfaction?");
    question_x.Rows.Add(1, "3) The notes are easy to understand?");
    question_x.Rows.Add(1, "4) The training room is appropriate?");
    question_x.Rows.Add(1, "5) The training time is satisfactory?");
    gvEdit.DataSource = question_x;
    gvEdit.DataBind();

}

    <asp:GridView runat="server" CssClass="table table-striped table-bordered table-hover" ID="gvEdit" DataKeyNames="ID" AutoGenerateColumns="false" HeaderStyle-BackColor="CornflowerBlue" HeaderStyle-Font-Bold="true" HeaderStyle-ForeColor="White" CellPadding="5">
    <Columns>
        <asp:BoundField DataField="Name" HeaderText="Question" ItemStyle-ForeColor="White" ItemStyle-HorizontalAlign="Left" ItemStyle-BackColor="graytext" />
        <asp:TemplateField HeaderText="Poor">
            <ItemStyle HorizontalAlign="Center" />
            <ItemTemplate>
                <asp:RadioButton runat="server" ID="chkP" onclick="javascript:GridSelectAllColumn(this, 'chkPoor');" />
            </ItemTemplate>
        </asp:TemplateField>
        <asp:TemplateField HeaderText="Good">
            <ItemStyle HorizontalAlign="Center" />
            <ItemTemplate>
                <asp:RadioButton runat="server" ID="chkG" onclick="javascript:GridSelectAllColumn(this, 'chkGood');" />
            </ItemTemplate>
        </asp:TemplateField>
    </Columns>
</asp:GridView>