i have eth in mist wallet, how do i transfer to gnt token? do i need to go through to exchanger?
I can't understand your question well, I think you ask that how to transfer your gnt to exchange? You need ETH as gas to transfer GNT token.
I think he wants to ask how he can buy gnt with ETH from his mist wallet.
Yes you must send your eth to any exchange that sell gnt like Poloniex or Bittrex, then you can buy gnt with your ETH.