For traditional gradients – IE 6-8 can support gradients using microsoft filters, IE9 supports SVG so you can base64 a gradient for it. However, I rarely bother with IE6-8 gradients and just use a solid colour fall back.
However, I think you’re out of luck with regard to border gradients.
Thank you for both of you. One thing more is box shadow’s property inset is not supporting in IE7 and IE8. Here i am using CSS PiE 3.0 htc file. and positioned it relative too but is not working in IE7,8 while it is good in other browsers.