Garmin G3X Pilot's Manual page 371

Selected
Navigation
Source
NOTE: To cancel Glideslope (GS) Mode without cancelling LOC Mode, press
the AP NAV Softkey once. Pressing it a second time cancels LOC Mode.
190-01115-00 Rev. K
LOC Mode Glideslope Mode
Active Active
ILS Approach PFD
Garmin G3X Pilot's Guide
AFCS
Glideslope
Indicator
349