Does GRT have a max supply?

Could you please clarify something for me? I've been following the cryptocurrency market quite closely and I've come across GRT quite often. However, there's one aspect about it that I'm not entirely sure about. Could you tell me if GRT has a maximum supply? I've seen different opinions on this matter and I'm really curious to know the truth. Is there a fixed number of GRT coins that can ever be created, or is it possible for the supply to expand indefinitely? I'd really appreciate it if you could shed some light on this matter for me.