The lasercode for gbus is only adjustable in the mission editor, not in the mission.
Other dcs-aircraft which do not have the capability to adjust them through aircraft systems (like f-16) adoptet showing/changing it in from the kneeboard as long as you are on the ground.
This feature missing makes the mirage f1 not being able to use gbus in dynamic mulitplayer servers with jtacs/drones as many use different codes for different jtacs. Also buddy-lasing is very compromised as you have to contact the server admins to check what is the default code (on some servers it was not 1688) and everyone using the same code is not a good idea.
In the current state gbus are not usable on this dynamic mulitplayer servers which are the goto-place for large parts of the dcs-community.
Example would be the 4ya cold war server which has different laser-codes for different regions of the map.
