the easiest way to describe the GDMX channels is it mainly shows syndicated programming but at weird times. Syndicated programming is the daytime/late night shows that can be shown on different stations per market. Its not "oh this is a ABC show it has to be shown on there". These are usually early feeds so the networks can take the feed and insert their own commercials in it.
examples off the top of my head
the "trash" TV (as some folks call it) shows...Springer, Maury, Steve Wilcos
Those "news" magazine shows (Extra, TMZ, the other one escapes me right now)
Judge shows (People's Court, Judge Mathis, Judge Alex)
the E/I Stuff like Jack Hanna's animals
various other syndicated stuff (Brian McKnight show, Comics unleashed)
popular shows that are now in syndication (Friends, Seinfeld, Family Guy, 2 1/2 men)
some current shows (Ellen..Martha Stewart was until this year)
Last year there was some feeds sent to Canada of shows that were not HD (Biggest Loser as example) and sent early. Last year they were on at 11:30 CDT Tuesday and mainly cut commercials to 30 seconds total of black space so you could see the show that would be at 7:00 on NBC at 11:30 that morning and already know the results
As i saw they are on oddball times or may be a couple days ahead. Maury, Springer and Steve are usually 3-4 days ahead (todays show will be shown on normal TV say Tuesday) and will be shown at maybe 10AM
The news shows are same day but shown a few hours beforehand. Example is TMZ. They are on at like 5:00PM on the GDMX feeds and 6:30PM on my distant Fox and 10:30PM on local Fox
There is no true schedule unless someone actually compiles it manually. But some shows you knew what channel it was on. Last year we had the "homewrecker" daytime on one of them
-Divorce Court at noon
-Maury at 1:00 (and at 9 that night too)
can any of that programming be found elsewhere on C or Ku band sats?
most of it is on your local affiliates