It sort of looks like it, that's probably it. I could swear, that's the first place I visited when I couldn't find the email and Ropu's post wasn't there.

Anyway, Ropu says" set the $attribute_name var with the info u desire to be shown"

That really doesn't work for me for two reasons, I think that variable should really be used for real attribute names as it is implied by its name, but mainly because I want the product model to appear in the confirmation emails sent by GoogleCheckout and since only a one line product name is included on those emails, the solution would be to append the product's model to the product name, which is what I have done and works fine for me.

Just need to change line 151 in gcheckout.php
from
PHP Code:
$products_name = $products[$i]['name']; 
to
PHP Code:
$products_name = $products[$i]['name'].' '.$products[$i]['model'];