Is a gigabyte larger than a terabyte

No, it isn't. Let's check the table below:

1 byte = 8 bits

1 Kilobyte = 1,000 bytes (in SI)

1 Megabyte = 1,000,000 bytes (in SI)

1 Gigabyte = 1,000,000,000 bytes (in SI)

1 Terabyte = 1,000,000,000,000 bytes (in SI)

1 Kilobyte = 1,024 bytes (in binary)

1 Megabyte = 1,048,576 bytes (in binary)

1 Gigabyte = 1,073,741,824 bytes (in binary)

1 Terabyte = 1,099,511,627,776 bytes (in binary)

So, as you can see 1 Gigabyte is equal to 1,000,000,000 bytes, and 1 Terabyte is equal to 1,000,000,000,000 bytes in the decimal system. There is also a binary system that computers use. In binary (or base 2), 1 gigabyte consists of 1,073,741,824 bytes, and 1 terabyte consists of 1,099,511,627,776 bytes. In other words, 1 Gigabyte is equivalent to 0.001 terabytes in Decimal SI (base 10), and 0.0009765625 terabytes in Binary (base 2). 

1 Terabyte consists of 1,000 gigabytes (decimal). 1 TB is equal to 10³ GB in base 10 (SI). Also, 1 Terabyte consists of 1,024 gigabytes (binary). 1 TB is equal to 2¹⁰ GB in base 2. 

We can finally say that a terabyte is 1000 times larger than a gigabyte.