Probably so, it is definitely a Gymno in the 'rhabdotus' group. There are a few different populations of ex-meridionalis, and they all look largely the same.
All of the ex-meridionalis have been put in the 'rhabdotus' group and are listed with their location in quotations.
G. sp. "sequeira", G. sp. "centro", G. sp. "sur", G. sp. "sarandi", G. sp. "paso pache", and G. sp. "aguas blancas" are the populations that Felipe Cantera recognizes as ex-meridionalis on his site. Here is a link to his site, under "cichlids" go to "rhabdotus group" under "G. n.sp." and it lists all the populations in the rhabdotus group, and you can look at pictures of each. But like I said, a lot of them look very similar and I don't think anyone could tell you which population you have.
http://www.aqvaterra.com/
Hope that helps, I would probably just call it G. 'rhabdotus' (ex-meridionalis) :lol:
Ed