Yes, 2002 stamps are still valid for postage in the US. You must total the value to meet the proper amount. Currently in the US that is 44 cents for mail.
I am not sure what you are asking, but it you are thinking about US stamps denominated as G, the one for first-class domestic mail sold for 32 cents. There were also G stamps for the postcard rate and pre-sorted mail. The reason for the G denomination is that the stamps were printed before new postal rates were set.
You can still use the G stamps today. It is worth 32 cents, unless marked for postcard rate or First-Class Presort, which are 20 and 25 cents respectively.
Alfred G. Boerger has written: 'Handbook on U.S. luminescent stamps' -- subject(s): Luminescent postage stamps
Harold G. D. Gisburn has written: 'Stamps and posts of the Anglo-Egyptian Sudan' -- subject(s): Air mail stamps, Postage-stamps, Postal service
It has a face value of 32 cents for the stamps. The G rate stamps were issued in 1995 when postage went from 29 cents to 32 cents.
It can be used for 17 cents worth of postage. By combining it with others, you can add up to the current rate. The US has not devalued any postage stamps since 1864, so they are still valid.
3 cents (Scott Specialized Catalog of US Stamps 2011, page 217)
3 cents (Scott Specialized Catalog of US Stamps 2011, page 217)
The G stamp has a face value of 32 cents. The H stamp has a face value of 33 cents.
The G rate stamps were issued in 1995 when postage went from 29 cents to 32 cents. Yes, it can still be used for 3 cents of postage.
Tasio G From Chessington Community College
G. Xanthakis has written: 'The flora of the Ottoman Empire' -- subject(s): History, Revenue stamps