What dan1888 said is the majority of the advice given in past threads on the question of ranges with exposed sides. The black side panel on a stainless range can be an aesthetic issue for some, but it's your house. If you are okay with the exposed black panel, go for it.

One thing to check for budgetary purposes is whether the panel(s) are included in the price of the range or will be an add-on purchase.

Now there are some models of silde-in ranges which come with unfinished sides and and for which the manufacturer does not offer panels. Bosch being an example of that. There are work-arounds for those. If that approach would interest you, see, for example, this older thread: https://www.houzz.com/discussions/6021772/need-ideas-to-cover-exposed-side-of-bosch-slide-in-range-no-oem-part#n=28. 

CR tested nine single-oven Frigidaire gas ranges and none performed well. The best was the GCFG3070BF; at least it received a 3/5 rating for baking. None of these ranges will look good if the side is exposed: The side panels are not flat (to strengthen the sheet metal) and the gap between the range and the wall will be visible (based on the diagram) because the range cannot be pushed against the wall. I would think that a gas range would be a particularly bad choice for an end-of-run location as spatters will be deposited on the floor instead of an adjacent countertop. Be sure that the electrical outlet and gas pipe are in the the locations specified in the installation instructions.

Ranges should never be on the end of a run, it is dangerous. Particularly if next to a doorway. The handles of hot pans will project out over open space alowing children and others to knock hot grease onto themselves. Or loose clothing or hair to catch on fire if it is a gas range. We would never sell a kitchen with a range on the end of a run.

Below is an article on the seven deadliest kitchen design issues. Range on the end of the run is #3

Dangerous kitchens

I did not ask any questions about where my range should go. Said I am replacing a range. This is how the kitchen came. Do folks seriously expect me to completely remodel my kitchen just to avoid that? 10 years of cooking every day in this kitchen, raising 8 kids, and never had the slightest issue because one side of the range was exposed. Yes we have to keep the handles pointed inward, just like we do with the front. Hopefully none of internet police call CPS on me for buying a house with (apparently) a deadly kitchen design

Houzzers's consensus is that you must "completely remodel [your] kitchen" to solve this problem. Do not use low-end materials such as vinyl or Formica. You have four months to do the work but may be granted an extension at our discretion. Provide before- and after-photos and additional documentation upon request or we will contact the internet police who will visit your house to perform a progress check. Start now.