I believe that GenieGo is designed to download the program to another device like a phone, tablet, etc. So you can download the program to any supported device and watch it where ever or download it while you're on the go.
To do this you first need a DVR or Genie receiver like the HR34 or HR44. Then stream the program using WiFi from your home receiver. Can you get adequate WiFi at a CG? Maybe but a lot of bandwidth is required and there are reports of swamped CG WiFi due in part to video download. And your connection may be quickly throttled at a CG.
I just take my Genie receiver with me in the MH, watch any recorded shows on it or use it with my dish for new programs.
From DTV: To use GenieGO™, you’ll need:
An active DIRECTV account and programming package.
A wireless broadband Internet network in your home.
An available Ethernet port on your wireless router.
An HD DVR (model HR20 & later or R22) connected to your home Internet network.
A computer or a mobile device with the GenieGO App. Download the free GenieGO app on up to 5 compatible devices.
Mobile DVR Service to activate your GenieGO. It will be automatically added to your account at no charge.