Hi Jorgen,
Before we go into details, why exactly do you want to connect GW to SUP again? If your goal is to consume backend data via mobile device, both technologies already do that for you. GW spits out OData via Restful web service, and SUP provides you with numbers of connection profile where you can choose to connect your mobile device to your backend system.
In any case, if you just want to try it out, this is I believe how you should set it up:
- Configure SUP to consume REST web service, see here for more details
- Consume GW from SUP using REST web service.
Best,
Rocky