Did you use a temporary e-mail when you initially invested?  I sent this out yesterday to the 9 people who have yet to contact me about getting their coins.

On 2014-03-12 18:39, ipo@gpucoin.net wrote:
> I see that you have yet to request your GPUC from your IPO investment.
>  If you are having difficulties, please send me an e-mail so I can
> help you set everything straight to get you your coins.  If you can't
> send an e-mail to this account, please feel free to use our temporary
> account StakAuto@yahoo.com while our e-mail servers are fixed.  Thanks
> for your continued support!
>
> Jaymes Reilly