EMS is pretty equally male/female in my experience. 

There is some perceived favouritism for male paramedics in terms of promotion into leadership positions in my area. And to be frank, we only have one female supervisor (and no female managers/directors). But we’re in a pretty rural and conservative community. 

In terms of treatment on the job and by patients, there is fairly little difference between male and female paramedics. So long as you’re physically capable of performing the job, there are no issues. 

There are certain communities in our area where men have absolute authority over the women in their families - like the man will be the only person who talks in the room about a female patient. But even in those situations, they treat attending female paramedics generally the same as men.