In two years aboard three different training bases I have never seen a student wearing the G-1 until they are winged. Take it for what it’s worth but I agree with
@Duc'-guy25 in that wearing one as a student would make you stand out in the wrong kind of way.
This is a litmus test as to whether a given instructor is a fucking dick or not. I mean, my SNA/SNFO days are well in the rearview mirror (by an increasingly disturbingly long distance ?). But with that seniority, or at least old-dude-ness, comes some perspective about what actually matters. As an SNA/SNFO, by regulation, you rate all the accouterments of Naval Aviation except one . . . the gold wings you haven't (yet) earned. Unless you attrite, this is true from now until you soft wing. So wear the damn G-1 if you want. For damn sure, wear brown shoes if you're in the penalty suit.
If an instructor is giving you shit about something that petty, they're probably one of two types. First, the ones who nobody liked in their fleet squadron. These people will use you as a punching bag to fill the hole in their self-respect that comes from none of their peers respecting them. They probably barely made the VTs anyway. Second, the "kiss-up/kick down" types. These guys have varying levels of aviation skill, and some may be quite good. But the Navy screwed up keeping them on board, because they also may be psychopaths. They can't treat everyone with dignity, except maybe the future rock stars. Any instructor who's worth a shit, from flight school to the fleet, has a measure of humility. And they can treat people with professionalism and respect, even if they're the kid one FPC or warmup away from attrition or a FNAEB.
Because whether you're the ace of the base (which in flight school or the RAG just means the tallest midget anyway), or an attrite, your aviation skill doesn't have any bearing on whether or not you should be treated professionally. In my career, there have been times I've found myself on the very top of the heap, the very bottom of the heap, and somewhere in between. And it really opened my eyes as to how petty people can be who forget what it's like to be the kid bucking for a spot in the fraternity. It's amazing how many humble dudes as students can't handle a couple of EP fitters without turning into condescending assholes. Even for people who can't make it, the process for getting rid of them doesn't require disrespecting or humiliating them. I'll reserve a right for mercilessly mocking obvious douchebags; it's Naval Aviation tradition to put them in their place. But most people aren't that. At least not all the time.
I'm just a washed-up SELRES hinge, but that's given me a chance to observe people leading people on the mil and civ sides of the house for going on 16 years. And anyone who'd harass an SNA/SNFO for wearing a G-1 is a fucking dick who just likes to kick people around so they can feel powerful for a little bit.