It's just a talking point, and a bad one at that. His post is about treatment of minors. The medical studies on GD showed that before social media it was entirely a boyhood issue and that after puberty the vast majority grew out of it. The very small minority left ended up cross dressing or being drag queens. Instead, your party is happy to chop off parts of kids before they are even done with puberty and chemically castrating them while they are still minors, before they've had a chance to grow out of it.
Multiple studies have shown that surgery for gender affirming care has done very little to the suicide rate. The issue is not with the body, it is with the mind. I would rather not use tax payer money to fund expensive surgeries for inmates that will still have them killing themselves later. Mental health care, yes, I'm good with that.