In my experience, the mousedown, mouseup, dragstart, dragend events work fine in place of touchstart, touchmove, touchend.

google.maps.event.addListener(myMap, "mousedown", function(event){...});

I'm pretty sure that gesture events are not going to be supported, since those are used for pinch-zoom functionality.

If you need gestures, you'd have to build your own recognizer by tracking mousedown events, storing them in an array, then tracking positions to determine angles, distances etc...