I found decision in „Command Line Options“ of SqueezeLite Player. Config located on „Edit Advanced Options“ button in SqueezeLite Player settings.
Command Line Options for Squeezelite
Look at -G <Rpi GPIO#>:<H/L> – Specify the BCM GPIO# to use for Amp Power Relay and if the output should be Active High or Low My example of line -G 14:H – 14 Pin High level on Player Power On.
-G <Rpi GPIO#>:<H/L>
-G 14:H
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