Hi,
Yes you can recall scenes by MIDI commands.
Scene Recall Bank and Program Change message To recall one of the 500 Scenes (4 banks) Also transmits this message when a Scene is recalled from the GLD screen For Scene 1 to 128 Scene SS 1 to 128 = 00 to 7F (refer to table) Select bank Recall Scene BN, 00, 00, CN, SS
For Scene 129 to 256 Scene SS 129 to 256 = 00 to 7F (refer to table) Select bank Recall Scene BN, 00, 01, CN, SS
For Scene 257 to 384 Scene SS 257 to 384 = 00 to 7F (refer to table) Select bank Recall Scene BN, 00, 02, CN, SS
For Scene 385 to 500 Scene SS 385 to 500 = 00 to 73 (refer to table) Select bank Recall Scene BN, 00, 03, CN, SS
Consult : https://www.allen-heath.com/media/GLD-MIDI-and-TCPIP-Protocol-V1.4_2.pdf
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Check you scenes to be correct so that they only change what you need (instead of everything) by using the recall filters of each scene.
Good luck