Gyalideopsis vainioi is a species of lichen in the family Gomphillaceae.

It was described as new to science in 1988 by Klaus Kalb and Antonín Vězda from Brazilian collections.

[1] The variety Gyalideopsis vainioi var.

semicirculata Lücking & W.R.Buck was published in 2007; it was found in Florida.

[2] The specific epithet honours Finnish lichenologist Edvard Vainio, known for his pioneering work with Brazilian lichens.