On my SD card, I've created all the correct folders including the 6 digit codes for the games, saves folder in wiiu, with the games, then c and u folders in each game folder in saves folder
You should not need to create the game-specific directories. That should happen when the game does a save.
- Please provide the version number from the settings panel in Loadiine GX2. (if there isn't one, download a newer version.)
- Check that your SD write-protect switch is set up, toward the leading/contacts end.
- Confirm that Loadiine is able to write to the card by going into Loadiine's settings and changing the GUI setting for the gamepad. (Change it to a different mode, exit Loadiine using the home button, wait for MiiMaker or the WiiU menu to start, turn off the WiiU, restart, go back into Loadiine, and note if the mode is still changed or if it reverted.) If Loadiine can't save its own settings, then game saves aren't likely to work either.
- Copy/Paste the content of wiiu/apps/loadiine_gx2/loadiine_gx2.cfg into a spoiler tag in your response. (If loadiine didn't make a .cfg file for you, that's another indication that it can't write to your SD card.)