i understand like these:
-imx is setup of n75 duty cycle where i want to go my boost
No. That isn't what IMX does. It limits the result of integrator windup in the I portion of the PID. In the case of spool, when both P and D approach zero, the main contribution to pre-lin wgdc is IMX, since the integrator is fully wound up
-drl is after boost made and is a fine tuning to linearisation the duty cycle
No, it is hardly fine tuning. If you look at the input (pre-lin wgdc) and the output (actual wgdc), you can see they can be very very different.
if boost not meet after imx ecu apply drl
No. DRL *always* transforms the result of the PID from pre-lin wgdc to post-lin wgdc.