I was wondering, as i looked in the various sections in TV but cant find any information.

Im a singaporean and i have a shan gf, we might be having a child in thailand bangkok but i wonder as both of us arent thai citizens, what would the nationality of the child be ?

both of us arent legally registered yet thoug.

unless either of you has a Thai permanent residency (or citizenship), then no.

The child should have access though to Singaporean citizenship at least if your laws allow it, as well as Burmese.