Gin Champion was one of a series of card games that Radio Shack sold, that were also instructional programs that taught one how to play the games in question. In this case, of course, the card game is Gin.
Title: Gin Champion
Author: ??? (Philidor Software)
Publisher: Radio Shack/Tandy
Released: February 1983 (written 1982)
Requires: Color Computer 1,2,3, 16K RAM tape or disk, joystick.