for Swizerland at least the office of statistics don't agree:
The salary gap in western countries is a myth, women on average get less money for working less hours and in positions that need less work to get into and this is fair. I've never heard of a case where a woman gets less money for the same job and the same amount of time, don't let yourself be fooled.
"Traue keiner Statistik, die du nicht selbst gefälscht hast".
I still don't see the average number of working hours and hours of overtime which are usually the number one reason for this gap I've never even encountered in real life and neither did anyone I ever knew.