The Controller & Auditor General of India.

There's no meaning of CAG, but only hav abbreavations
Carrier Air Group, Comptroller and Auditor General,Combat Applications Group ,Community Advisory Group (,Canadian Association on Gerontology.,Carcinogen Assessment Group,Coverage and Analysis Group, etc
u can find many more abbrevations
http://www.acronymfinder.com/af-query.asp?Acronym=CAG&Find=fi nd&string=exact
is the siet where u can find 2 many abbreavations & many more

There are many expansions for CAG, u have asked this Q in other category, so I furnish some:
CAG Cagliari, Sardinia, Italy - Elmas (Airport Code)
CAG California Association for the Gifted
CAG Call Accounting Gateway (Telcordia)
CAG Canadian Association of Gastroenterology
CAG Canadian Association on Gerontology
CAG Cancer Assessment Group (EPA)
CAG Carcinogen Assessment Group
CAG Carcinogenic Assessment Group
CAG Carp Anglers Group
CAG Carrier Air Group
CAG Cash Against Goods
CAG Casualty Adjusters Guide
CAG Cheap Ass Gamer (website)
CAG Chief Accountants Group (UK)
CAG China Art Gallery (China)
CAG Chuckle and Grin (internet chat)
CAG Civil Affairs Group
CAG Closed Angle Glaucoma
CAG Clothing Advisory Group
CAG COEA Advisory Group (US Air Force)
CAG Colegio Americano de Guatemala (Spanish; Guatemalan school)
CAG Collective Address Group
CAG Column Address Generator
CAG Combat Applications Group (Ft Bragg, NC; aka Delta Force)
CAG Combat ...more