As someone who's had a nose job, trust me, Gabby did not have a nose job. She'd be recovering for YEARS. Your face turns every color of the rainbow over the period of a month. You're not allowed to wear glasses for a minimum of 6 months. It's one of the most invasive surgeries one can get and believe me when I say she couldn't get by with it under the radar.
There are non-surgical nose jobs as well (not tehcnically a nose job, but a nose filler rather) after which you're fine after like a day or so.
But imho it's out of question, she did not get her nose done aesthetically in any way. Her nose slightly changed which is neglectable given how much her bleeping forehead has changed lmao