Dunno how Google Maps works with right click on iPad, if at all. On the Nook, the only way to shrink or grow the map is to use +/- buttons, due to the lack of a mouse wheel. (Poor interface design...PINCH and UNPINCH work in other apps to change the magnification. I'm guessing that Google just doesn't see the Nook as a big enough market to build a version just for it.)
An optimist sees the glass as half full.
A pessimist sees the glass as half empty.
A realist drinks it no matter how much there is.