[Gretl-users] "join"two gdt panel data files (B) save them as time series

Hello all, I attach two gdt panel data files (is what I managed to do, TIME is a time index, GEO lists 38 countries/regions, and two variables CP00, CP01), example1.gdt goes from 2016:01-2018:12 and example2.gdt goes from 2019:01-2022:04 (A) is there an "easy" way to "join" the two gdt files into one time-larger file? running from 2016:01:-2022:04? (B) how can i "easily" transform the panel dataset into a time-series set with 38 CP00 series, say EU_CP00, EA_CP00,... and 38 CP01 series, EU_CP01, EA_CP01,...? PS = OK I admit "easy" is rather varue. I mean using the mouse menu route or i guess a few hansl lines? (of course many more lines would be also welcome if there is no other way ...). Thanks Yiannis