In-system stargate

[Periculi]

It is not possible. You can create a jump-drive effect, but you won't be able to switch the stargate to use that method.

[digdug]

I thought this might be the case Sad . I've decided to use a network of stations where you dock with one and select another to jump to (using customPicker).

that should work, if you dock with the stargate and use the function objJumpTo.
But you are not using any topology features there.