Agreed that it is a replica. The label doesn't look at all like my 1983 issue G-1, or any other US military label I have seen. Think black on white. So this may be made to USN specifications but it does not appear to be USN/USMC issue.
Issued G-1 jackets are even-number sized and are meant to be form fitting. Female naval aviators are probably issued jackets cut especially for women. A busty woman in a man's jacket would look ridiculous because the rather high waist of the jacket would be much too wide in fit. G&B definitely makes the G-1 in women's sizes, as evidenced by your jacket and the G&B website.
IMO you have a women's jacket which is cut as a women's jacket and would not be a proper fit for a man. I wouldn't cut the label off and sell it as a man's jacket.
Yeah I thought that but I'm 5'10, skinny, and the shoulders, waist, chest, and sleeves fits me perfect. Just not convinced there is any different other than the pit to pit, I'm definitely not busty or featuring child bearing hips, lol, I'll just list it with measurements and people can make their own decision