GPU miner is impossible with the HVC core, check this page http://heavycoin.github.io/about.html#cpu-only for details
Some people have a lot of merged CPU hash power. it looks insane, yes. but they do.. the top 100 are people with a lot of CPU power.
I assure you that GPU miner is definitely possible with HVC. The sooner it's created and made public the better for this coin. Really, reworking HEFTY1 to remove conditional branches is a child's play. This coin being cpu-only is a pure marketing bs, don't believe it.
If creators of this coin are so sure that it can't be efficiently mined with GPU I'd be happy to prove them wrong for a nice generous bounty.
prove them wrong then, create a gpu miner for this coin. seriously I will believe it when I see it but so many people say that the code is easy to get around for gpu mining but nobody has the answer to back up their statements, until someone backs it up then it's a load of hot air. I have found the secret of alchemy, the dark art of turning base metals into gold, see anyone can say something, doesn't make it true though without proof.