I am not sure how is it in other places, but I really donīt think that 1 amp GH in cooling bag does much for security, even if they open the bag. It is 1 amp and not commercial quantity... so customs wouldnīt care either.
You need prescription for the carry-ons , due to security issues (anthrax, poison, etc) but if you check it in it really doesnīt matter. They put my protein bars and powders into a sc sniffer several times to check if it contained explosive or drugs, but that is it...