Can liquid nails be used to add tile rows above tub/shower

So I got the walls tiled up to about 6 feet and looked to finish the wall abobe it and decided maybe shoulda went all the way up. There is green board up already and I dont want to take it down and add backer. Is it good to put tile up there with liquid nails? will it hold? and then grout over it. should I or even can I use thinset on the green board instead?

If tiling over the green is not good then I will paint or maybe sheet goods. It might sound a little uncaring or Mickey mouse but just want to finsh now. i have learned a lot and expect my next bathroom job to be much nicer Much Much nicer. Dont realy want people to know I did this one.

Thanks