I think you will need a lot of skills and experience and luck when using LN2 on a GPU. macci's Finnish team is one of the only one who benched GPUs on LN2 and only that once. IIRC he ran into stability and bootup problems, which hit me as well when I did LN2 on GPU.
LN2 is just damn hard to tame on a GPU, you gotta try it to believe it