In a webmaster hangout on YouTube, Google’s John Mueller said that Google does not use GPS coordinates that are mentioned in your structured data for search purposes:
“We don’t use GPS coordinates in that regard. If you have addresses on a page then that’s something I would mark up but, as far as I know, we don’t use GPS coordinates.
If your business is located in place where there is no actual postal address, I don’t know what we would do in a case like that. […] If it’s really a matter of different business locations and you do have addresses then I would focus on addresses and not GPS coordinates.
You can view the video here:
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