i believe that in google API version 2, it could eventually call this method out. Moreover they do share or happen to be using the same type of coding.
However in version 3, i could not set this layer to the map neither via "layer.setMap(map)" because this esri method does not has this function , nor "map.addOverlay(layer)" because this function belongs to version 2 which has been taken down. can i ask what is the method replacing "map.addOverlay(layer)" in version 3. i have try using custom overlay function, but is comes out as a image which doesn't match the result i want.
** take note : ArcGISDynamicMapServiceLayer is to call a time aware data layer from esri
Have a look at these examples: http://gmaps-utility-gis.googlecode.com/svn/trunk/arcgislink/docs/examples.html