GA, GUE, GUI, GO Y GU

http://www.edu365.cat/primaria/muds/castella/ortografiate/ortografiate2/contenido/comun/index.html?ln18=es&pathODE=../sd17/sd17_oa02/&maxScore=3&titleODE=.:%20Ga,%20gue,%20gui,%20go,%20gu%20:.

http://isabelpgarcia.blogspot.com/2010/04/ga-go-gu-gue-gui-gue-gui.html