dissolution of as little as a single gramme is no worry, you can dilute the acids so they dont give off a lot of nitrous oxides.
you can place a pot with water and sodium carbonate on stove to gently heat it up, then inside this place a small beaker with the metal along with acids and ontop of this a beaker thats larger or similar, the gasses will then have to bubble through the solution, maybe calcium hydroxide could work - its very effective at filtering acidic gasses, its used for underwater "re-breathers" to remove CO2, as CO2 is removed in this system the pressure is kept constant with oxygen from bottle, its quite efficient and CO2 isnt super acidic. if this method is to be used its a good idea to place additional weight on top of the second beaker so it doesnt dance around
a lazier method would be to place a bit of ammonia solution nearby the metal dissolution as the ammonia vapors would effectively tackle the nitrous vapours
now.. NOCl is quite nasty stuff, but i believe it was NileRed who demonstrated that you can keep 98% H2SO4 on your hands as much as 30 seconds before it will start to actually etch, now as this is my first post i may wanna explain that my username doesnt entail that im 10 years old, ive been dealing with chemistry for 10 years. ive had many acids on my hands a bunch of times, i just stopped wearing gloves. i found it especially funny that many gloves contains toxic chemicals. safety is always a good idea, eyes are very sensitive, but your hands - surprisingly resistant to chemical splashes.
nitrous oxides such as generated from dissolution of gold is serious and inhaling too much can cause death, make no mistake. but to put things into perspective, many cars throw out this gas in very dilute form, when you have dealt with nitrous oxides a couple times you will start to notice the smell coming from cars. the more you know? diluting it down a great bit and cranking up heat would be my best advice, as NOCl is a fairly strong acid it shouldnt depend on concentration to still be able to react, which with weaker acids such as acetic acid would be a game changer.