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If the narrative treats the grandma's ideas as wrong, it's Good Is Old-Fashioned. If it's the reverse, it's Good Old Ways.
MAX POWER KILL JEEEEEEEEWWWWWBorn in the Wrong Century, Fan of the Past or Evil Reactionary? Both Good Is Old-Fashioned and the Good Old Ways are positive portrayals of people with older moral standards, so they don't fit.
No, read it again: Good Is Old-Fashioned is when some people sees someone with "good" qualities as old fashioned. Whether that someone is wrong or right on his "goodness" is irrelevant.
But Born in the Wrong Century may be more apt.
MAX POWER KILL JEEEEEEEEWWWWW

Trope question: A character has one or more moral or ethical standards that are considered extremely archaic, and cause him/her to say and/or do things that are against the grain of current thinking and can be detrimental to people that have to deal with him/her.
Is this a negative spin on Good Is Old-Fashioned, Good Old Ways, or another trope?
Here's the specific scenario; the first-person character was raised by her maternal grandmother, who instilled some very deep-seated neuroses regarding the female body and sexuality, and was also a paladin in her youth:
"It's because you have demon in you," Glory said. "Isn't it?"
"That's the short version," I said. "I was...partly raised...by a woman who didn't think much better of women than she did demons."
"Martha," Glory said. "Brimstone Blaise. From what I know of her, her way of thinking was old-fashioned when she was born, and old before that."