Here are the full details of Forbes's profile on Gomez Addams.
It may be worth noting this the below would not be accurate by movie cannon, where Fester is Gomez's older brother.
#12 Addams, Gomez
Net Worth: $2.0 billion
Source: Inheritance, Investing
Marital Status: Married
Hometown: Westfield, N.J.
Education: Astin School of Law, J.D.
Descendant of Castilian royalty and British aristocrats owes fortune to quirky--and lucky--investment style: bought a swamp for "scenic value," subsequently discovered massive oil deposit underneath; purchased mummified hand at flea market, later determined to be priceless remains of Egyptian pharaoh. Extensive holdings include insurance company, salt mine, tombstone factory, buzzard farm. Known for eccentric behavior, including affinity for sword fighting, Halloween tradition of bobbing for live crabs. Doesn't like to write checks for odd amounts; always rounds up. Passionate collector of toy trains: once bought a railroad simply so he could crash real steam engines. Reportedly spends a thousand dollars a week on cigars.
View full details Forbes website