[Gretl-users] X-12 ARIMA

Hello, I'm a young practioner of economics and I've been trying to Seasonally Adjust a large number of datasets related to employment. Since I'm using a Mac, I've installed both gretl and the X-12 option. I'm fairly tech-savvy but hit a wall so I thought I'd ask for some help. Basically I have a dataset which includes the date, as "date", by month; and employment, as "emplab". If I open up the gretl UX I can easily Seasonally Adjust the data, save it to a .csv with a new variable and continue on. My problem lies in that I need to do this frequently, and as a batch. With this in mind I've been attempting to get X-12 to work with gretlcli in Terminal so that I could do things as a batch that way. My question is: Am I approaching this correctly? Is arima the correct command? I used "help arima" in gretlcli and didn't see an option to create a new variable for the SA data like the UX provides... Thanks in advance, Patrick.