Ok, I figured it out on mine easily. Sync console, sync Wii U, then on your tv screen will be 4 little card icons. Enter them on your game pad from your tv screen from left to right. There ya go :-)
did all that, I think my problem is the gamepad just isnt fully charged and the console is making me have to charge it till its full before it connects for some reason. still waiting for it to charge though. I did all that stuff where you type in the symbols and it displayed that screen saying it wouldnt connect, try holding it closer. when the power button on the gamepad itself is pushed, it WILL turn on the console, it will also say when i try to re-sync that it is already paired with the console so on some degree it must be synced, it just wont let me do anything until i charge it i think. i will just have to wait and see if the problem persists after charging