It looks like I may have successfully written an alpha “migrator plug-in” that may work for migrating your com_google_maps component from Joomla 1.0.x to 1.5.
Once I have tested this on the internal testbed migration sites for one of my customers, I will write it up here.
This will be useful since the developer of the Google Maps API for joomla has no current migration plugins.
Stay tuned….

Did this go anywhere? I would like to do the same thing – if you have published your script I would love to check it out. Thank you.
Not really. I still have the code hanging around somewhere, but never migrated the customer to Joomla 1.5. I can email you a copy if you would like, but it may not work.