Data Source With GZIP file

Hello All, 

I need your help about importing data from a data source in Service Now. A tool in my company are exporting us data in csv format compressed in gzip format. 

If I try to import this file in the data source the import doesn't work. But if I import the file after uncompressed it, the import work. 

I think gzip format is not supported in data source (even if I check the "zipped" checkbox). Can you confirm that ? 

In this case, how can I import this file directly in Service Now ? 

Thanks, 

Alexandre