Would like to contribute

Hi. Your Google Maps plugin appears to be lightweight and exactly what I was looking for. I would be interested in contributing to your plugin if you have a git repository I can make pull requests to.

In particular, I could add geocoding, or a preview for the shortcode.

As a reference, I run one of the Leaflet Maps plugins: https://github.com/bozdoz/wp-plugin-leaflet-map

https://wordpress.org/plugins/wp-gmap/