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Currently, no direct API in zk gmaps for such things. However, you can use Gmarker, Gpolyline to draw such "path".

1. Use the webservice to get the "From", "To", and "direction" information back.
2. Per the information, prepare the Gmarkers for "From", "To".
3. Per the information, draw the Gpolyline.

You can post a ZK Features for this so we can track it. Thanks.