Not sure what you mean, but the best guess I can make is:
What does the G in Gm, Gg, etc mean - ie as a prefix to a unit.
In this case it is a prefix of Giga- which means multiply the unit by 109 which is the same as 1,000,000,000:
1 Gm = 1 Gigametre = 1,000,000,000 m
1 Gg = 1 Gigagram = 1,000,000,000 g = 1,000,000 kg = 1,000 Mg = 1,000 tonnes = 1 Kilo-tonne
etc.
The enharmonic equivalent to A-flat is G-sharp; The enharmonic equivalent to G-flat is F-sharp.
G-sharp is the same as A-flat.
The equivalent of 1 gram (g) is 1000 milligrams (mg).
No, they are not equivalent.
G sharp
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Catholic Agency For Overseas Development
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"Save Our Ship" and/or" Save Our Souls"
Naval Criminal Investigative Service i think
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Most often it's 'Minister of Parliament' or Military Police.
what do the colors standfor in the roman flag
It doesn't really stand for anything, but it is short for Pocket Monsters.
You can write a lot of equivalent expressions; the simplest is:4g meaning you multiply 4 times g.
The enharmonic equivalent to A-flat is G-sharp; The enharmonic equivalent to G-flat is F-sharp.
G-sharp is the same as A-flat.