Hello guys!
I bought B732 few days ago in order to simulate former Serbian airline operations (Aviogenex - cs model based aircraft). They used to have a little GPS inside the cockpit which is very similiar to KLN90B. I have downloaded and installed it but I have issues with installing navigraph airac cycle and also my autopilot doesnt want to follow GPS. I was searhing on the web how to do it, but no help. The main issue is how to make aircraft follow GPS. Can anyone help me? I would really appreciate any kind of help.
Thanks in advance,
Relja

The NAV/GPS Switch is above the Marker Beakon Lights, (L16, on the top right of the diagram of the CAPTAIN’S INSTRUMENT PANEL, on page 15 of the ‘737 Captain’ MANUAL Part II – Aircraft Systems (csx737_manual2.pdf)) which are above the Captain's Radio Altimeter.

Its operation is explained in the ‘737 Captain’ MANUAL Part II – Aircraft Systems, on page 70 - UP is GPS, DOWN is NAV.

Note. You can download the manuals from the 737 Captain  product page > Sim Ops > The 737 Manuals