This has been talked about on many occasions. But I'll go over the details that should hopefully help prove it again.
This GMCard.com site has the Solstice listed as a Future Car, I don't think it would be on the site if you couldn't use them.
http://www.gmcard.com/GMCard/apply/vehicles/pontiac_gallery.jsp
When you sign up for a GM card on their website, one of the options for the image on your GM Card is the Solstice.
http://www.solsticeforum.com/forum/showthread.php?t=725
On that same thread as above I posted my GM Card information packet brochure and highlighted the appropriate info.
http://www.solsticeforum.com/forum/showpost.php?p=14078&postcount=7
The reason the Solstice doesn't show up currently on the GM Card site is because it's not out yet, and it's a 2006 model.
This GMCard.com site has the Solstice listed as a Future Car, I don't think it would be on the site if you couldn't use them.
http://www.gmcard.com/GMCard/apply/vehicles/pontiac_gallery.jsp
When you sign up for a GM card on their website, one of the options for the image on your GM Card is the Solstice.
http://www.solsticeforum.com/forum/showthread.php?t=725
On that same thread as above I posted my GM Card information packet brochure and highlighted the appropriate info.
http://www.solsticeforum.com/forum/showpost.php?p=14078&postcount=7
The reason the Solstice doesn't show up currently on the GM Card site is because it's not out yet, and it's a 2006 model.