B/GL.2 – Initial wartime version (20 built)
B2/GL.21 – G.2 with revised ailerons (21 built).
Also known as the GL.21C.1.

B3/GL.22 – New wing, tail, landing gear (71 built).
Also known as the GL.22C.1.

B4/GL.23 – Test versions (9 built).
Also known as the GL.23C.1.

GL.23TS – Air ambulance version (1 built)
B5/GL.22ET – Unarmed version of B3.
Also known as the ET.

GL.24 – Test versions
GL.24X – Test aircraft to investigate the effects of overloading (1 built)
B6 – Aerobatic version for Jérôme Cavalli with Hispano-Suiza 9Qd engine (1 built)
B7 – Aerobatic version for Fernand Malinvaud and  Adrienne Bolland with Lorraine 9Na engine (2 built)
B/GL.2 – Initial wartime version (20 built)
B2/GL.21 – G.2 with revised ailerons (21 built). Also known as the GL.21C.1.
B3/GL.22 – New wing, tail, landing gear (71 built). Also known as the GL.22C.1.
B4/GL.23 – Test versions (9 built). Also known as the GL.23C.1.
GL.23TS – Air ambulance version (1 built)
B5/GL.22ET – Unarmed version of B3. Also known as the ET.
GL.24 – Test versions
GL.24X – Test aircraft to investigate the effects of overloading (1 built)
B6 – Aerobatic version for Jérôme Cavalli with Hispano-Suiza 9Qd engine (1 built)
B7 – Aerobatic version for Fernand Malinvaud and  Adrienne Bolland with Lorraine 9Na engine (2 built)
Gourdou-Leseurre GL.2