GC is a commonly used abbreviation that refers to different words and phrases, depending on the context. It could mean "Gas Chromatography," "Genetic Counselling," or "Good Company." If you're talking about computing, "gc" stands for "Garbage Collector," a program that frees up memory on a computer system. Additionally, "gc" is also a commonly used shorthand for the term "group chat," a feature used in messaging applications to enable individuals to chat in a group setting. If you're writing an academic paper, GC could also be an abbreviation for "General Certificate," which may refer to high school diploma or other similar qualifications.