I think what Ajeh was asking was ... when you add JUST your GV product to the cart and then start checkout, do you see the checkout_shipping page? or does it skip it?
The idea is to attempt to rule out how you've got the product configured, vs being something *else* wrong on your site.
If it's not skipping the shipping page, then it's not seeing it as a GV, which suggests that it's not properly seeing that the model has "GIFT" as prefix for some reason.
... which begs the question about installed addons, changes to ot_gv.php code, etc etc etc



