More specifically, make geoJSON from a Google spreadsheet because you can view that in a beautiful Mapbox map on GitHub. YEAH!
This is a super simple node.js command line tool (NPM) that fetches your data from Google Spreadsheets and transforms it to geoJSON with the option to write it to a file. When you push the file to GitHub after running the script, you can view it in your repo as a lovely map!
npm install -g gs2geojsongogogeo YOURSPREADSHEETKEYgogogeo YOURSPREADSHEETKEY --save to write it to a file to push to GitHubSee directly below if you want to know more about getting lat and long

File > Publish to the Web > Start Publishing. Copy the key generated between the = and &:
npm install -g gs2geojson to install it as a global module.npm test and it will run with a sample spreadsheet.gogogeo YOURSPREADSHEETKEYgogogeo YOURSPREADSHEETKEY --savegogogeo YOURSPREADSHEETKEY | pbcopy