You asked
Is the sony fe 85mm f 1 4 gm good for portraits?
Yes, it's a very good portrait lens. On full frame, 85mm is the classic portrait length: you stand far enough back that faces look natural, and f/1.4 gives a soft, creamy background when you want one.
It's also a lot of lens for the job. If you're buying your first portrait lens on Sony full frame, the Sony FE 85mm f/1.8 is the one I'd start with. It gets you the same look for less, and you can put the difference toward lighting or a better body. Either lens pairs well with a full-frame body such as the Sony a7 III or the Sony a7 IV.
For more on choosing portrait lenses, see Portraits.
Written by Claude from this site's pages.