Usage patterns
唇に〈物〉グロスを塗るto apply lip gloss to one's lips
I applied lip gloss to my lips before going out.
〈物〉にグロスをかけるto give something a glossy finish
I finished the photo by giving its surface a glossy coating.
〈物〉をグロス仕上げにするto give something a glossy finish (as opposed to matte)
This wallpaper has a glossy finish.