Walt mentions them.
When confronting the black gang members; Walt spits his tobacco before he draws his gun. Which was Josey Wales' signature move.
The trailer is shown.
The movie is mentioned in the end credits "Chuck Lorre Productions, #235" card.
A woman says that Grand Torino (2008) made her cry
This is a featurette about Clint Eastwood making the film "Gran Torino" (2008)
Home entertainment bonus feature
In the hospital there is a racist Korean War veteran (this is an allusion to Clint Eastwood's character Walt Kowalski from Gran Torino), also like Kowalski he mentions he killed Asians back in the war to an Asian nurse.
Subject of a $500 question
One of the missions is called "Get Off My Lawn!".
Subject of a $400 clue in the category "21st Century Cinema"
mentioned in dialogue
Title mentioned by comedian Steve Byrne during his standup routine
Shawn says, "Eastwood in 'Gran Torino'? There's a guy you want to hop in the tub with."
Referenced in the "Doggie Duty" segment
Clint Eastwood (Bill Hader) quotes the line "Get off of my lawn!" in one of the "Eastwood Ad" segments.
Schmidt calls Nick "Gran Torino", referring to him being older and grumpy.
Clips shown when this movie is reviewed.
A fragment is shown.
"How to Be A Man" segment
Clips shown, and mentioned during Clint Eastwood presentation
Clips of mistakes shown
Clips shown when David chooses it as one of his top three international movies.