Sure Mike,
There are several solutions.
Different Cable-Brands offer Y Cables to split the signal.
The guitar Y cable will fitt but will probably not be the wanted quality partner.
Beware, just spliting up the siganal will be influencing things like impedance and other valuable matching.
Always a matter of,..... try, and listnen.
I have good experience with Harmonic Technology.
Happy listening,
Cor