Gate Sharing With Alliance Airlines

I think that you should be able to share a gate with other airlines or alliances.

Example: Qantas uses emirates A380 only Terminal in Dubai

This is planned for AE4, I believe.

first of all that is called a codeshare flight and secondly:

AE4

Codeshare flight is something quite different from a gate share.

As I assume that the original poster is meaning that if one alliance member builds a gate somewhere and is not using all the slots then (depending on settings by the gate owner I would think) alliance members could use up slots without having to buy a gate for themselves for that one slot they want to use.

maybe an ability for them to set a small fee because then you would actually gain a bonus for sharing

Codeshare flight is something quite different from a gate share.
As I assume that the original poster is meaning that if one alliance member builds a gate somewhere and is not using all the slots then (depending on settings by the gate owner I would think) alliance members could use up slots without having to buy a gate for themselves for that one slot they want to use.