CG Theatre produces a full-scale musical in the fall and a stage play in the spring. Any CGHS student may audition for a role or volunteer to help with stage and technical production. Callouts are communicated via the school announcements and in the Theatre and Music departments.
Previous shows:
| Spring | 2016 | Heaven Can Wait | Fall | 2016 | Guys and Dolls | |
| Spring | 2015 | Curious Savage | Fall | 2015 | Mary Poppins | |
| Spring | 2014 | All Shook Up | Fall | 2014 | Unsinkable Molly Brown | |
| Spring | 2013 | Footloose | Fall | 2013 | Letters to Sala | |
| Spring | 2012 | Cinderella | Fall | 2012 | Charley’s Aunt | |
| Spring | 2011 | Sound of Music | Fall | 2011 | Awesome 80’s Prom | |
| Spring | 2010 | Reflections | Fall | 2010 | “U.T.B.U.” | |
| Spring | 2009 | Singin’ In The Rain | Fall | 2009 | You Can’t Take It With You | |
| Spring | 2008 | Follow the Money | Fall | 2008 | Joseph…Dreamcoat | |
| Spring | 2007 | The Wizard of Oz | Fall | 2007 | Arsenic and Old Lace | |
| Spring | 2006 | Anything Goes | Fall | 2006 | Smoke on the Mountain | |
| Spring | 2005 | 42nd Street | Fall | 2005 | Heaven Can Wait | |
| Spring | 2004 | Hello Dolly | Fall | 2004 | Godspell | |
| Spring | 2003 | Guys and Dolls | Fall | 2003 | The Miracle Worker | |
| Spring | 2002 | The Music Man | Fall | 2002 | Ramshackle Inn | |
| Spring | 2001 | Peter Pan | Fall | 2001 | Romeo & Juliet | |
| Spring | 2000 | The Wizard of Oz | Fall | 2000 | Inherit the Wind | |
| Spring | 1999 | The Curious Savage | Fall | 1999 | The Taming of the Shrew | |
| Spring | 1998 | The King and I | Fall | 1998 | Heart and Souls | |
| Spring | 1997 | Fiddler on the roof | Fall | 1997 | Charley’s Aunt | |
| Spring | 1996 | Pippin | Fall | 1996 | Oliver | |
| Spring | 1995 | Godspell | Fall | 1995 | On Golden Pond | |
| Spring | 1994 | The Sound of Music | Fall | 1994 | Steel Magnolias | |
| Spring | 1993 | Oklahoma | Fall | 1993 | Death Takes a Holiday | |
| Spring | 1992 | The King and I | Fall | 1992 | You Can’t Take It With You | |
| Spring | 1991 | George M | Fall | 1991 | Charley’s Aunt | |
| Spring | 1990 | The Miracle Worker | Fall | 1990 | The Curious Savage | |
| Spring | 1989 | The Wizard of Oz | Fall | 1989 | Nights of One Acts | |
| Spring | 1988 | Four One-Act Plays | Fall | 1988 | Heaven Can Wait | |
| Spring | 1987 | A Night of One Acts | Fall | 1987 | But Why Bump off Barnaby | |
| Spring | 1986 | A Night of One Acts | Fall | 1986 | The Uninvited | |
| Spring | 1985 | Ramshackle Inn | Fall | 1985 | “U.T.B.U.” | |
| Spring | 1984 | The C.G. Showcase | Fall | 1984 | You Can’t Take It With You | |
| Spring | 1983 | The Music Man | Fall | 1983 | The Mouse Trap | |
| Spring | 1982 | Hound of the Baskervilles | Fall | 1982 | The Curious Savage | |
| Spring | 1981 | Night of One-Act Plays | Fall | 1981 | Gods Favorite | |
| Spring | 1980 | Pajama Game | Fall | 1980 | The Gift of Murder | |
| Spring | 1979 | Brigadoon | Fall | 1979 | Heaven Can Wait | |
| Spring | 1978 | Hello Dolly | Fall | 1978 | Ramshackle Inn | |
| Spring | 1977 | South Pacific | Fall | 1977 | Death Takes a Holiday | |
| Spring | 1976 | Fiddler on the Roof | Fall | 1976 | Arsenic and Old Lace | |
| Spring | 1975 | Camelot | Fall | 1975 | The Miracle Worker | |
| Spring | 1974 | Finian’s Rainbow | Fall | 1974 | The Crucible |
