(you don't need to sent an email to both developers and users mailing lists, once is enough)

As far as I know, there is no Online gretl. There are some solutions you can try, like setting a Linux machine running `broadway`, this allows GTK applications to be used on a browser, but you need to make that server accessible from the Web.

Other option (I don't know if anyone already did) is to have Jupyter Notebook, which requires a gretl-kernel (don't know if exists).

Good luck.