@stormdragon -- your question has previously been asked on this forum, and the responses have been "not possible" to turn it off.
Reference about what can be set (BlueCurve, not Gateway) is on this Shaw web-page.
Note that most of the buttons on the remote-control affect the Gateway, with a few exceptions:
- power (turn the TV off -- the Gateway never turns off)
- input (source on your multi-input TV)
- volume up/down
- mute
that affect only the TV.