My garage light is wired to 2 three way switches.  I forget to shut it off sometimes when I enter the house and my door is solid.  I bought a 3 way switch with a “on” pilot light.  When I took the cover off the switch going to the garage I found the power (load) feeding the switch was in the light.  The neutral wire from the switch was wired to the black hot wire from the load.

The black hot wire was connected to this switch.  The white (now hot) was connected with  a wire nut and fed one side of the other switch.

The common terminal (black screw) on the switch going to the garage light was connected to the other side of the other three way switch with the white wire (had no black screw but three brass screws.)  The red wire from this switch was connected to the other side of the switch going to the garage light.

This leaves me with “no neutral wire in this switch box” to connect the neutral wire from the pilot light.  Can I hook the neutral wire from the pilot light to the ground wire and the black pilot light wire to the common wire between switches?

There is no way to get a neutral wire to this box since they are all in finished walls.