Gus Portokalos is a fictional character from the film series My Big Fat Greek Wedding. He is portrayed as a proud Greek-American father who is deeply connected to his heritage and culture. Gus is known for his humorous personality and his belief that everything can be improved with Windex, a common household cleaner he often uses for various ailments. In the story, Gus is the father of Toula Portokalos, the main character, and he plays a significant role in her life as she navigates her relationship with Ian Miller, a non-Greek man. His character embodies the themes of family, tradition, and the challenges of cultural differences.