"The super-trainers school [new employees] in techniques, in standards, but most essentially in spirit," according to the GQ article that inspired the TV show. "These super-trainers are the SEALs of the Fresh Mex fast-casual game, and they are also its sages." That article's called "Inside the Church of Chili's," and it's a hilarious read that'll also give you some hints as to what the show might consist of.
Keep in mind that, for obvious legal reasons, the restaurant will probably be a national institution of casual dining with flair, spirit to spare, and hyper-devoted servers that goes by a slightly different name (Chile's with an E?).
It's hard to believe it'll be stranger than the true story though, where they call the kitchen the "Heart of the House," and people saying things like, "I don't like seafood and I don't eat fish, but I love Chili's salmon."