4
manuals
Manuals & documents
View any document right in your browser, or download the PDF.
PDF
Flat Mount Template
Most used
PDF
Flush Mount Template
PDF
GNX 20/21 Installation Instructions
PDF
Owner's Manual
About this product
This page collects every official document Garmin publishes for the GMI 20 Marine Instrument (010-01142-00) — so you can install, troubleshoot, or check warranty terms without hunting through a drawer.