There haven't been very many native Barovians or Gundarakite players. It is also very challenging to play, and not everyone may know with certainity how to react in some situations.
In doing the research before and during the playing of my Gundarakites, I formed this outlook:
My Gundarakites grew up on a farm, having no exposure to either cleric or mage powers.
So when Gibrana landed a job at the Lady's Rest, and she was suddenly surrounded by 20 to 40 outlanders, there was some huge tension.
She'd never seen magical light even, let alone the other "unusual" powers.
She pretty much tried her best to stay clear from anyone who didn't appear as "normal," by her own culture's definition.
Ellfric, her brother, is the first generation Zsivosky to become faithful to the Morninglord's message (as interpreted by a Gundarakite).
He's had more exposure to clerics because of this.
He's slowly becoming a bit more comfortable with the things clerics do, but those are only things such as healing spells and the like.
With his bride to be, a cleric, after seeing clerics perform regularly, he may notice the difference between a mage casting owl's wisdom and a cleric.
But if that mage does so discreetly, or masks it as a prayer, then no biggy.
Basically, my natives will react fearfully to spells, either cleric or mage, that are not of a healing nature, and that produce dramatic effects such as stone skin, fireballs, death magic, and the like.
I don't know how they'll react in every situation, and glad for it, since part of the setting and the joy is not knowing how these tensions will always play out.
I can't account for how other players with natives interact in similar situations. The best course of action is to talk about the role playing of natives in the forum, without putting those players on the defensive, especially given how challenging it can be to role play a native.