G4 green chilli refers to a specific variety of green chilli. Green chillies are commonly used in various cuisines around the world, including Indian, Thai, Mexican, and more, to add spice and flavor to dishes. However, without more context, it's difficult to provide specific information about the G4 variety. It's possible that G4 refers to a specific cultivar or strain developed through agricultural research or breeding programs. If you're looking for information on this specific variety, you may need to consult agricultural sources, seed catalogs, or research papers related to chilli pepper varieties.