GSPN is used to express very large currency exchange of SpartanCoin. One GSPN is one thousand MSPN, and it is one thousand of one thounsand of one thounsand of one SPN.
How about buying a pet? How much is a cat? A cat 1000000000.00 SPN. kSPN? that is 1000000.00 kSPN. MSPN? that is 1000.00 MSPN. They are right. Five cats 5000.00 MSPN. Now GSPN. One Cat 1 GSPN, Five cats 5 GSPN. How many cats do you wat? I want one hundred cats. then pay 100 GSPN!
1GSPN = 1000MSPN
1GSPN = 1,000,000kSPN
1GSPN = 1,000,000,000SPN