The highlighted companies are not owned by Bloomin' Brands. They are competitors, actually. I've been in charge of project management on a few of their most recent restaurants over the last couple of years.
Brinker International only owns Chili's and Maggiano's restaurants. They used to own a few more (Macaroni Grill and On The Border to name a couple), but they sold off brands back when the economy tanked around 2008-2009. (My wife worked for Brinker in their accounting department at the time and Brinker was the largest client that the architectural firm that I worked for had at the time). Not sure about their gun policies, but I rarely if ever visit them anyway (unless I'm in Dallas, then I'm quite likely to go to Maggiano's. I freaking LOVE their cheesecake).
Darden owns Olive Garden, Red Lobster and Long Horn Steakhouse, to name a few. I know this because I still work with that firm previously mentioned and I do a good bit of work on their current projects. Again, I don't know about their policies because I don't visit them.
That all being said, I think their (Bloomin' Brands) stance on guns is wrong. Although, I kind of side with gerhard1 when it comes to them (or any other business) ejecting civilians for legally carrying firearms.
Thanks for clarifying that, I didn't think Bloomin' owned Brinker. I had a friend who worked for them pretty high up in corporate until a few years ago, right about when they sold Macaroni Grill. She moved out of the country and now does something completely different, so I wasn't sure if maybe Brinker had been acquired or something, but I knew they weren't owned by Bloomin' at that time.