What is the output of the GK pickup?
get an ohmmeter and measure each coil - and tear it apart - take lots of pics for re-assembly!!
I estimate each coil will measure 1k to 3k ohms.
Sure - connect them all in parallel - but it will no doubt sound quite brittle, zero warmth due to Bridge location -and require a buffer amp.
Watch out for the individual coil phase polarity of each pickup -
More details here:
http://ftp.terratec.de/AXON/HELP_FILES/AXON_13-pin_Specification_v1.0.pdfthe DIN-13 pin 9 has the following spec:
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GK-3A uses Pin #9
pin no. 9
Name: Guitar/Mix/GK Switch Status
I/O NC/O
Function (open)/select signal
Specifications:
OPEN : GK-2/2A compatible
0.521V(+/-5%) : GUITAR position of GK-3 compatible
1.042V(+/-5%) : MIX position of GK-3 compatible
1.563V(+/-5%) : GK position of GK-3 compatible
other conditions are prohibited