About Gands. Canon states there are two varieties; one with lungs (those who breath) and one lungless (who doesn't breath). What's SWC canon, however, may be different depending on development plans and current state of implementation. What are the current rules about character breathing?
I see all my NPCs, even the non-Gand, can "breath" Gand planet's atmosphere, which consists of ammonia, without problems. I have had no problem with my character either and I tend to be forgetful of his "need" to wear a breathing mask. Judging solely on what I have already experienced by playing the game's mechanics, there is no restriction. That's the motivation for asking.