G visa
A G visa is a category of official visas issued to diplomats, government officials, and international organization employees who are visiting the United States temporarily for a governmental purpose. G visas may also be issued to immediate family members of the principal visa holder. G visas are issued by the United States Department of State. G visas are not issued to heads of state, who are instead granted an A-1 visa. Types. There are five visas in the G visa category: Work authorization. G visas give work authorization to the primary holder of the visa. A family member  with a G visa is eligible for work authorization only if the individual is a married spouse, an eligible domestic partner, an unmarried child under age 21, an unmarried child under age 23 who is a full-time student at a college or university, or an unmarried child of any age who is physically disabled or mentally disabled.