Gayahin mo ito.
Huwag mo akong gayahin.
Don't copy me. Don't do like I did.
Ginaya ko sila.
I copied them. I did as they did.
The Tagalog phrase gaya-gaya puto maya is used to mock someone who is trying to copy someone else (gaya means "to imitate"). It has nothing to do with the rice cake puto maya; the words simply make a nice rhyme in Tagalog.