Some people don't know this so the confusion is of course understandable. Previous GOLOS split into two, one is on Golos.Id ( GLS) and another is Golos.Io ( GOLOS). People tend to mix those because of the name. GLS is in fact the original.
Golos Blockchain (GLS) - a few exchanges are available and they are all easy to use.
GLS is GOLOS.ID