gta

Short definition from Wiktionary

Contraction

1. 1
   Abbreviation of gotta.

Proper noun

1. 1
   Initialism of Greater Toronto Area, the most populous urban region in Southern Ontario, Canada.
2. 2
   Initialism of Greater Tokyo Area.
3. 3
   Initialism of Grand Theft Auto, a series of video games by Rockstar Games involving car theft and gang warfare.

Noun

1. 1
   Any game in the Grand Theft Auto series.
2. 2
   Initialism of graduate teaching associate.