How do you take programmatic control of the markers with the GMap module? Do I have to dig into the JavaScript? Or is there a hook into the macros? I looked at the .ini files in the modules/gmap/markers directory; but it's not obvious to me where to put a hook.
Ideally, I'd like to do 2 things: 1) feed marker location from fields on another drupal node to the gmap and 2) pull lat/long from a web service on another server so that the marker moves while I'm looking at it.
Worst case, I'll start hacking on the javascript; but I thought there would be some "official" way to do it.
Thanks.