If you check the file in GZip from 1999 (1.2.4a) it is not licensed with GPL: inflate.c -- Not copyrighted 1992 by Mark Adler version c10p1, 10 January 1

If you check the file in GZip from 1999 (1.2.4a) it is not licensed with GPL: inflate.c -- Not copyrighted 1992 by Mark Adler version c10p1, 10 January 1993 You can do whatever you like with this source file, though I would prefer that if you modify it and redistribute it that you include comments to that effect with your name and the date. Thank you. [The history has been moved to the file ChangeLog.] EDIT: Changed formatting