This term is actually a series of acronyms and related terms. GZIP itself is a term for 'GNU ZIP', which is a an acronym for the GNU operating system, also an acronym for 'GNU is not Unix'. The ZIP in GZIP stands for zip file, a compressed file or data stream. The format and the name of the format was created to be clearly independent from patents and related proprietary issues in this type of program and software use. GZIP is an open source program. GZIP is published under general public license.
Examples of GZIP: