GA1

GA1 or GA-1 may refer to:

Science and Medicine

 * GA1, Glutaric aciduria type 1, an inherited genetic disorder
 * GA1, Gibberellin A1, a form of the gibberellin plant hormone

Transport

 * Boeing GA-1, a 1921 American armored triplane
 * Celair GA-1 Celstar, South African aerobatic glider
 * GA 1, the U.S. Route 27 in Georgia, USA

Other

 * Ga1, Golden Axe (video game), a side-scrolling arcade hack and slash game released in 1989 by Sega
 * GA-1, the Georgia's 1st congressional district
 * GA1, the United Nations General Assembly First Committee (also DISEC or C1)