Assuming you operate commercially check your stable approach criteria, ours states that we SHOULD be fully configured, landing checks completed by 1000' agl (approx 3.2nm) and you MUST meet these criteria by 500' AGL or a go-around must be executed.
Outside of that our SOP's follow the glide slope intercept or FAF for gear-down, I believe it is still wise to have a trigger point for the gear, if you are already descending on the glide then what other than a DME reminds you? The warning horn?! If you were in a hi9gh workload situation then these things can be missed.