Rezopole provides an API Google ODS2 Gmap service allowing creating googlemaps from the spreadsheet files: rezopole.net/ods2gmap/

About ODS2

ODS2 is a Multiplatform Software Application for Creating Integrated Physical and Genetic Maps. ODS2 has a graphical user interface and is implemented entirely in Java, so it runs on multiple platforms. Other features include the flexibility of storing data in a local file or relational database and the ability to create full or minimum tiling contig maps.