There are no search results that provide a clear definition of "random gc." However, based on the search results, it seems that "gc" can stand for "group chat".

• Reddit post: In a Reddit post, a user mentions that Instagram randomly made them create a group chat (gc) without their knowledge with people they are not even following.

• Random Golf Club: "Random Golf Club" is a company that creates unique products, media, and experiences to inspire a global community of local golfers. They use the abbreviation "RGC" for their company name.

• Instagram account: There is an Instagram account with the handle "@random.gc._" that posts photos and videos and invites followers to join a random group chat.

Without more context, it is difficult to determine what "random gc" specifically refers to.