Place your marinade ingredients into a Ziploc bag with your chicken thighs and give them a good mix. Load the Ziploc into a bowl and then place in the fridge overnight.
The next day remove the bowl from the fridge and get rid of the Ziploc bag. Using the attachment for the rotisserie load the chicken onto it and then push it down to fit in as much as you can.
Then secure the rotisserie into place and air fry for 30 minutes at 180c/360f, followed by a further 30 minutes at 160c/320f.
Whilst the air fryer is rotating make your tzatziki sauce by mixing some of the cucumber you have diced with the rest of the tzatziki sauce ingredients. Then test and if too garlicky balance it out with a little more lemon juice and Greek yoghurt.
Also load the rest of the cucumber into a bowl, another with tomato and then get out anything else you plan to serve with it.
When the chicken thigh gyros are cooked allow to cool for about 5 minutes.
Then remove from the rotisserie and it will be like a big log of chicken pieces and then slice them lengthways into chunks that resemble chicken kebabs you have purchased.
Once fully sliced you will have a big collection of gyro chicken meat that you can then make a gyro bowl with or load into pitta breads with your cucumber, tomato, and sauce.