Data Controls :: Pass Multiple QueryString Parameters In HyperLink Inside GridView?

In one of the web page say "Default1.aspx" I have a Gridview.I am using 2 DataKeyNames in Gridview. i.e., DataKeyNames="G_Name, Param_ID" Also, I have one Hyperlink inside Gridview, upon clicking, page navigates to other page say "Default2.aspx"

code of "Default1" page: 

<asp:GridView ID="GridView1" runat="server" DataKeyNames="G_Name, Param_ID" AutoGenerateColumns="False" Width="100%" PageSize="8" AllowPaging="True" OnPageIndexChanging="GridView1_PageIndexChanging">
<Columns>
<asp:BoundField HeaderText="Goal Name" DataField="G_Name" Visible="false"/>

[Code]....

code of "Default2" page:

protected void Page_Load(object sender, EventArgs e) {
if (!Page.IsPostBack) {
string name = Request.QueryString[0].ToString();
string id = Request.QueryString[1].ToString();
}
}

I want to pass multiple parameters in querystring. I wrote above code.

Problem is: I am unable to write the correct syntax for Hyperlink NavigationUrlTherefore, it is giving me below error:

DataBinding: 'System.Data.DataRowView' does not contain a property with the name 'GF_Name, Param_ID'.

at Line:

<asp:HyperLink ID="HyperLink1" runat="server" NavigateUrl='<%# Eval("GF_Name, Param_ID","~/Default2.aspx?Name={0}&Id={1}") %>'
Text='<%# Eval("GF_Name") %>'></asp:HyperLink>

how to resolve it.