Whether or not to use gzip compression.
If this property is set to true, the task will operate on tar archives that have been compressed with gzip. The interface of the task remains the same. During compression, the data will be streamed through a gzip compressor as it is written to the file. During decompression, the task will unzip the data to a temporary tar archive, and then automatically decompress the tar archive.
The creation of the temporary tar file will occur when the task is invoked.
The temporary file will automatically be deleted by the task after it is no longer needed. To extract the tar file itself (rather than its contents), the Gzip task should be used.
If this property is set to false, the task will create and read ordinary, uncompressed tar archives.