There are several companies that are making grills now that will attach to the quick connect (low pressure) ports that are coming, almost as a "standard option", on many of the newer RVs.
I am one of those that didn't like the models being offered and I bought one of the Weber Q-120 grills. The nice thing about the Weber Q series of grills is that the regulator and the gas control valve are two separate pieces. This allows one to remove the regulator, while leaving the burner control, and attach a male quick connect plug in its place in order to attach it to the low pressure port on the RV. I made up two hoses, one 4' and another 12' to connect the grill to the low pressure port on my FunFinder. The 12' allows me, on nice evenings, to get the grill out from under the awning and away from open windows so that the TT does not fill up with smoke from a leisurely cook
CW carries the "pieces" that you would need to make a conversion. In reality, any grill that has the regulator as a separate piece from the burner control can be modified, but, the Q series Webers are by far the most "popular" for that conversion...they cook nice, fold up compactly and with several models in the "Q" series, you can get one to fit your cooking needs.
Don & Bronwyn + 1 Cat; J-Lo
2014 Thor Tuscany 40RX (AKA, "The Cat House")
2015 Jeep Cherokee Trailhawk Towed