Yes.
If you place the effect after the NORMAL INPUT block in the effect screen (effect chain), you can apply the desired effect only to the normal pickup sound.
* Turn on the NORMAL INPUT block and the effect.
* Make sure that the select switch of the divided pickup is set to the "MIX" position.
* If a GK series unit is installed, connect your guitar/bass to the normal pickup input jack of the GK series unit.