You do not need G32. See example for using G76:
G80
G90
G00 G53 Z-18.
G00 G53 X0.
T404
G97 S150
G00 G54 X3.5 Z0.4 M03
G76 P2 X4.29 Z-1.493 D0.020 K0.1 A15 F0.1667
G76 P2 X4.166 Z-2.777 D0.020 K0.1 A15 F0.1667
G00 Z0.36
G76 P2 X4.29 Z-0.305 D0.040 K0.1 A15 F0.1667
G00 Z0.32
G76 P2 X4.29 Z-0.345 D0.040 K0.1 A15 F0.1667
G00 Z0.28
G76 P2 X4.29 Z-0.385 D0.040 K0.1 A15 F0.1667
G00 Z0.36
G76 P2 X4.166 Z-1.633 D0.040 K0.1 A15 F0.1667
G00 Z0.32
G76 P2 X4.166 Z-1.673 D0.040 K0.1 A15 F0.1667
G00 Z0.28
G76 P2 X4.166 Z-1.713 D0.040 K0.1 A15 F0.1667
G00 G53 Z-18. M09
G00 G53 X0. M05
M30
Note starting Z point and ending changes to allow for width of tool.
Also note, this is 2 different diameter, 6 pitch threads, each getting its own quick start.