How many gb in a Geopbyte?

A geopbyte is equal to 1,000 brontobytes, which is equal to 1,000,000 yottabytes, which is equal to 1,000,000,000 exabytes, which is equal to 1,000,000,000,000 petabytes, which is equal to 1,000,000,000,000,000 terabytes, which is equal to 1,000,000,000,000,000,000 gigabytes