Gig has various meanings in different place s for some it could mean Job yet to others it could also mean an event

Gig is also informal for a concert, so it depends on the context.

gig = job

That’s correct so apart from a concert it is a measurement unit. So when choosing, updating equipment or storage sizes. The digital sizes are measured in B ( bites) B= bite KG = kilo bite MG = mega bite GB = giga bites TB = Tera bites Nowdays anything lower than GB has no use really. We need so much digital storage. So if someone ask you how many gigs you want on your hardware, that is what they are referring to.

There are two possible meanings to my knowledge: the one is a "gigabyte" relating a to a unit of measure of space in computers. The second one is a concert, i.e. "will you be going to the gig later?" "Gig is slang for a live musical performance. Originally coined in the 1920s by jazz musicians, the term, short for the word “engagement”, now refers to any aspect of performing, such as assisting with and attending musical performance. More broadly, the term “gigging” means having paid work, being employed."