How to Connect a Wii U Gamepad to a Wii U WITHOUT the TV?

I bought a used Wii U console that didn't come with a Wii U gamepad and bought a gamepad separately.

I can't see the TV connection, as the Wii U is clearly not in AV Video output, and the HDMI inputs on my TV have long since died on me. I would like to connect my Wii U gamepad to the system, but you apparently also need the TV to sync a Wii U gamepad to a Wii U.

Anything I can do to sync the gamepad to the console without a TV?

You need a TV or other form of display to finish the process of setting up a Wii U out of the box. (or if it's factory reset)

This can be connected via the analog video output, or HDMI on the Wii U.

The connected display is only needed for the initial setup, and after it is finished, the console can be used with the gamepad alone, or with the TV as you see fit.

In your case; I'd suggest finding any TV with an analog video input, and connect the Wii U to that for the setup. The Wii U uses the same shaped analog AV adapter as the Wii, so if you have one of those lying around, you can use that.