Besides English, gretl is also available in Albanian, Basque, Bulgarian, Catalan, Chinese, Czech, French, Galician, German, Greek, Italian, Polish, Portuguese (both varieties), Romanian, Russian, Spanish, Turkish and Ukrainian.

It can also import ASCII, CSV, databank, EViews, Excel, Gnumeric, GNU Octave, JMulTi, OpenDocument spreadsheets, PcGive, RATS 4, SAS xport, SPSS, and Stata files.

A simple example of hansl: Running the above code produces Random Number Generation (RNG) in gretl has been examined and tested in Yalta & Schreiber (2012).

[10] The authors conclude "Our results show that the RNG related procedures in gretl are implemented soundly and perform well in the three crush test suites of the TestU01".

The following is a list of textbooks that use gretl as their software of choice: In addition, a free supplement[11] to Hill, Griffiths and Lim Principles of Econometrics (Wiley) is available.