It is doubtful that that IG will be closed for any of the major Disney Skyliner construction. The IG station is being built in the old VIP Bus loop right next to the IG. Only issue might be a limited closure for the actual cable pull but I would expect that to happen rather quickly. The cable loop from the IG station lifts up and over the IG walkway and meets the first main tower behind the France pavilion.
Here is a picture of the early Disney concept art showing the IG Skyliner station adjacent to the IG entrance.