I'm pretty sure others on here will tell you that you can't, but if you don't have the Shaw Gateway phone app you might want to get that. You can look at the guide and set recordings from anywhere you have internet access. It's a great app so everybody with a Gateway should have it anyway!
I have the "Go Gateway" app on an Android phone, but I may not have cell network access when I'm away. I may be too cheap to buy a local sim card, and I'm not certain that the phone is unlocked.
I most certainly will have Wi-Fi access, and the phone definitely connects to Wi-Fi. After a quick test (removed sim card), it looks like the Android app will work on Wi-Fi networks alone. So that may be my solution.