Go to GT build calculator. Put in the item of interest in its respective slot.
Click on it.
Immediately above the item, you’ll see prefixes and suffixes.
You can filter them by rarity as well.
I think it’s best shown with an example:
https://www.grimtools.com/calc/w263Xl8V <— Base solael sect pants
https://www.grimtools.com/calc/q2mWxr0Z <— GG double rolled pants