gcl: gcl (GNU Common LISP) gcl: gcl: The GNU Common LISP system. The GCL system contains C and Lisp source gcl: files to build a Common Lisp system. The original KCL system was gcl: written by Taiichi Yuasa and Masami Hagiya in 1984. The AKCL system gcl: work was begun in 1987 by William Schelter and continued through 1994. gcl: In 1994 AKCL was released as GCL (GNU Common Lisp) under the GNU gcl: Public Library License. gcl: gcl: A number of people have contributed ports and pieces. gcl: