Hi all,
to anyone who may be interested, it is possible to use sqlite with gretl on linux. There is a short guide on the wiki on how to do it.
https://gretlwiki.econ.univpm.it/index.php/SQLite

For those who don't know SQLite, it is a serverless database so no special configuration is needed and the database is contained in a single file.
If you have a dataset that could be saved in a csv file but the size of the data is too large to be handled by the pc sqlite could be the solution.

Federico