It appears to be a Hebrew name meaning "God is my crown" or "my crown is God". It would be masculine, though I have found a fairly even mix of males and females with this name upon searching. I have yet to come across Katriela, but if the feminine of
Gabriel is
Gabriela /
Gabriella, then I don't see why it wouldn't work.
"It's the job that is never started that takes the longest to finish." - J.R.R. Tolkien
http://babynames.com/namelist/9415432