The INFLATECOLUMN command allows you to select a single column and de-compress its content. Use the DEFLATECOLUMN to compress the column.
gor ... | INFLATECOLUMN column
The INFLATECOLUMN command will de-compress columns starting with the zip:: keyword at the start of the column indicating the the content is compressed. Trying to de-compress a column that is already de-compressed will return the original column data.
gor ... | inflatecolumn data
Returns a row where the column named data is de-compressed if its content is compressed.