So, as SG (and we're a small group, me being the only SG), I'm fine portraying the effects of the Gift, and I'm also fine with stories where the players don't have to face it. It usually creates tension, risk, and conflict, which is often interesting, but, then again, combat is pretty similar in that aspect, and I, of course, wouldn't force combat on players if they took (rules-legal, reasonable and effective) measures specifically to avoid it.
We don't have any Gentle Gifted magi, so it wouldn't hurt anyone, and thus it's chiefly about whether it's allowed for by the rules (which is not that important in and of itself - but it's an indicator of whether it was intended to be part of the game's concept), and whether it makes sense in the game world.
I'm tempted to think, that based on your comments, the answer to the first point is probably yes. The game world is probably a bigger issue here. If the effect is possible and is just inventing a spell of reasonable level (to, say, suppress the Gift for Sun duration), the only rational conclusion is that it must be ubiquitous on the order, because it's so useful. That would, in essence, mean, that magi, in general, should have no trouble passing as mundanes.Which of course should change the whole setting considerably.
I guess then my question is then more along the lines of:
Has someone tried allowing this, and to what results?