There is a tool from Google called 'clasp' that allows your work to be 
downloaded locally, but it can't be run because 
Google Apps Script is compiled server-side. Nevertheless, it's
useful for version control!

See here:
https://codelabs.developers.google.com/codelabs/clasp/#0

APPENDUM: On further searching, this could prove useful but 
I've yet to work through it. Potentially using clasp and VSCode together.

https://www.labnol.org/internet/google-apps-script-developers/32305/