So let me try understand a little more ...
You only want to use the GYRO for the Tail Servo and nothing else on the TG6100M ?
So then ..
Plug your Servos directly to the RX, except the Tail Servo as it still plugs into the RUDD channel on the Gyro.
Plug RUDD (Yellow) from the Gyro into the RUDD on your RX.
Plug CH5 (Green) from the Gyro into the GEAR on your RX.
Now comes the problem ..
You only have 1 power plug from the ESC, to power both units and since the power throughport on the Gyro is the Aileron, you cant use that into your RX ..
1. Get a Y splitter from the ESC so you can plug power directly to the RX and Gyro unit.
2. Take the Aileron wire (White) out of the 3 wire plug on the Gyro and put the Throttle (Orange) wire in its place. Then plug that into the Throttle connection on the RX.
Then plug the ESC into the THRO on the Gyro and it will feed power to the RX via the THRO connection.
Head Hurts Now ...