GA1

GA1 or GA-1 may refer to :

• Boeing GA-1, a 1921 American armored triplane
• Celair GA-1 Celstar, South African aerobatic glider

and also :

• GA1, Gibberellin A1, a form of the gibberellin plant hormone
• GA1, Glutaric aciduria type 1, an inherited genetic disorder
• Ga1, Golden Axe, a side-scrolling arcade hack and slash game released in 1989 by Sega
• GA 1, the U.S. Route 27 in Georgia, USA
• GA-1, the Georgia's 1st congressional district