What does GSM stand for?
GSM stands for "Gibbons Stamp Monthly"
How to abbreviate "Gibbons Stamp Monthly"?
"Gibbons Stamp Monthly" can be abbreviated as GSM
What is the meaning of GSM abbreviation?
The meaning of GSM abbreviation is "Gibbons Stamp Monthly"
What does GSM mean?
GSM as abbreviation means "Gibbons Stamp Monthly"
