Hi, SiN
Dose your stepper motor lock up with power on.
There should be low ohms reading from RED to WHT = phase 1 & connected to Gecko Phase A, B and YEL to GRN = phase 2 to Gecko
Phase C, D.
Check your other stepper motors or disconnect motor to check.
Check pin 7 on your Gecko drive, If wire connected disconnect, Does the stepper lock up and work now (Disable Pin, Gnd to Disable Drine)
Gecko Pin 10, 5 Volts + from Arturo´s c11 board, Put a volt meter between pin 10 to pin 8, Should see 5 volts when stepping in one direction.
Let us know
Hope this Helps, Chip