Hi & welcome from Texas. I found a couple of sites that might help you. One is how to use the Towa bobbin tension gauge & the other is from Superior Threads that is a Towa Tension Gauge Reference Guide. The guide doesn't show Glide thread on it but maybe this will help you some.
https://www.youtube.com/watch?v=5vt--RNwexo
https://vw-superiorthreads.storage.g...sion-guide.pdf