Satelite TV Hookup

Either of those will work. If you can find a path from your firewall up to a cabinet via the window pillars it makes for an easy connection. There is also a flat coax cable available that allows you to nearly fully close your window should you choose that option.

Thanks for your replies. Do I need to drill a hole somewhere to bring the coax into the coach or do I run it thru the window (rolled up as much as possible)?

You cannot use the coach "Cable In" connection for satellite TV as it came from the factory, but there is a chance that the cabling could be modified to be used for either satellite only or with an A/B switch or similar inside the coach you could choose which input you wanted. You might need to find an RV tech to re-wire things or check with a Gulfstream owners forum to see how Gulfstream wired their coaches.
If you have a video control center (usually a black box with a variety of buttons for TV, Aux, VCR, etc.) the rewiring job can be easily accomplished by you.

It's better to bypass the RV External TV Jack to prevent interference for the satellite antenna. You need a direct path from the dish to the receiver for best results.

The Dish antenna cable screws on to the connection at the back of your receiver box marked as "Satellite Antenna In" or something similar. Then you connect a cable from the receiver box connection marked "Out To TV" or "TV Out" to your TV Or use the RCA connectors (Red,Yellow & White) or HDMI cable if so equipped to get the signal from the receiver to the TV.