Acronym for gay cunt, commonly used as an insult. Other insults in the 'cunt' family include dumb cunt (DC), sick cunt or shit cunt (SC), mad cunt (MC).
The 2011 & newer Grand Cherokee is Jeep’s most popular product. It is soo popular, I always see at least 3 of those beauties a workday, & I only live 3 miles away. Being my dream car, everybody in my family knows what a GC is.