The MOS FET operates on voltage, so I feel that this resistor is not necessary.
Why is it there?
Amongst other things, the FET gate resistor is inserted to:
|- protect against parasitic oscillation, |
- protect against surge on the gate,
- suppress the switching speed,
- make adjustments to match the current drive capacity of the previous stage.
The main purpose of this resistor is to protect against parasitic oscillation (resonance).
Parasitic resonance occurs when Q of the resonant circuit becomes large due to parasitic capacitance and parasitic inductance in the MOS FET.
Therefore by adding a several-10 to several-100 Ω resistor to the gate, the Q value is lowered and oscillation and ringing are reduced.
A resistor with an even higher resistance value is necessary to protect against surge, but be aware that a high resistance causes the operation speed to drop significantly.
We therefore advise you to determine an appropriate resistance value that accords with the specifications of your system.