Hi,
that's a bug of the Google Maps API itself.
See here - a very simple basic example Google Maps API example:
https://developers.google.com/maps/docum…ples/map-simple
There the mouse-wheel isn't working too in IE11 (in IE10 it is).
There are already several bug reports at Google - e.g. here two:
https://code.google.com/p/gmaps-api-issu…/detail?id=6071
https://code.google.com/p/gmaps-api-issu…/detail?id=5944
You could vote-for/star-there these issues.
When Google will fixed this one day, it should start working automatically, because the Google Maps API code will be loaded directly from the Google servers.
Best regards,
Klaus