Yes, you can glue some glueless wigs, but ask why before you do it. A glueless wig is designed to stay on with fit, combs, elastic, lace grip, or a band.
When adhesive makes sense
A tiny amount of lace spray or gel may help for a special event, windy day, or very clean hairline finish.
When it is a bad idea
If the cap does not fit, glue will not fix the real problem. Too much adhesive can build up on lace, irritate skin, and make removal rough.
Bottom line
You can glue a glueless wig, but the best glueless install should not depend on glue every day. Fix fit first, adhesive second.