I would be very hard pressed to link Adwords directly to your gateway pages as that is likely against Google policy as unfortunate as it sounds.
I would recommend using a blog or third party site to send you google Adwords traffic too that drives value for people and on that site setup your SFI gateways. You,might want to use Adwords to promote a free product which is downloaded from you blog site and in that product brand in you SFI embedded links to your gateway pages.
I would be very hard pressed to link Adwords directly to your gateway pages as that is likely against Google policy as unfortunate as it sounds.
I would recommend using a blog or third party site to send you google Adwords traffic too that drives value for people and on that site setup your SFI gateways. You,might want to use Adwords to promote a free product which is downloaded from you blog site and in that product brand in you SFI embedded links to your gateway pages.