I know your time is important, so I wanted to verify some things to help w/ troubleshooting.
I used your JGecko U Updater tool to get the proper versions of everything.
The first time I ran JGeckoU, it connected fine. It sent codes successfully the first time, then when I added some more and tried to send it gave an error and didn't send them, but was still connected to the Wii U and Wii U hadn't crashed. Then I tried to get a memory dump and it crashed the wiiU.
Ever since, J Gecko U refuses to connect at all.
I don't remember what screen I was on in-game when I connected JGeckoU successfully, but I believe I have tried them all with no luck. I also tried the Campaign Mode workaround for COD Ghosts on your youtube, this didn't work either.
I am using the correct IP address to connect. I even rebooted router and changed the WiiU's internal reserved IP address. No luck.
I also tried connecting with a fresh install (virtual machine) of Windows to make sure it wasn't something fucky or Winbloat related. No luck.
I have tried with both pressing A and X to load the different handlers / versions of gecko (btw minor feature request on that, select one and boot it every time w/o button press, maybe hold y to override that or something?)
I'm sure I've made a mistake somewhere, but I can't figure it out. Any help would be appreciated, and thanks for your time and all your hard work