GUnzip

GUnzip is Java-based application whose only purpose is to extract archives compressed with the GZIP format, as the name implies. It is very simple to use, since there are no configuration settings put at your disposal.
Installation is not a requirement, but you must have Java installed on your computer. You can drop the JNLP file anywhere on the hard disk and click it to run.
An alternative is to save GUnzip to a USB flash disk or similar storage unit, in order to run it on any computer with Java seamlessly.
What's worth mentioning is that no new entries are added to the Windows registry, and extra files are not created on the hard disk without the user's consent.
The interface is represented by a very small window where you can click a button to point out to a GZIP archive for processing, as the drag-and-drop feature is not supported. All you have to do is establish the output directory and proceed with the extraction operation.
GUnzip does not put a strain on computer performance because it runs on a low-to-moderate quantity of CPU and RAM. It is very responsive to commands and works well, without causing the OS to hang, crash or show error notifications. We have not found any problems in our testing.
Although it is not the most resourceful application available, GUnzip offers a straightforward and free solution to extracting GZIP files rapidly and with minimum effort. No recent updates have been made to the tool, though.