Whether you give a non Jew a present for” his holiday”- or for the” end of the year”- do what you wish.
But to me it is a chilul hashem not to give them a gift.
When my kids went to Yeshiva- we had a non Jewish bus driver. He knew that all of us parents were paying a lot of money to send our kids to “private school” instead of public school. I always gave a gift ( money). Even when the driver was hired by the township…Otherwise he would have thought” those cheap Jews…”
Many non Jews have limited experience with Jews and to me, to tip, to give a nice holiday, Dec, “whatever” gift, is actually a kidush hashem,because it generates good feelings in this world, without doing something that is against our value system.
I knew someone who did not want to give a Xmas gift- so they gave it for Thanksgiving instead.
Call it what you may- but give a gift!!!