.GridViewHeaderStyle
{
    background-color: Transparent;
}

.GridViewStyle
, .GridViewRowStyle td
, .GridViewHeaderStyle th
, .GridViewEmptyRowStyle td
{ 
    border:1px solid #696969;
}

.GridViewEmptyRowStyle
{
    text-align:center;
    font-style:italic;
}

.GridViewStyle td
{
    padding:0 5px;
}

.GridViewHeaderStyle th
{
    padding:0 5px;
}