That's true - but the silent w is a left-over in the spelling from a
time when the letter /was/ pronounced. There was a time when the w was
pronounced in two, sword, answer, and write. So you don't get a silent
w in new words.
And pronouncing "GotW" as "Got" would, I think, be confusing. If the
full phrase is too long to use, I would introduce it once when
explaining what it is, and then abbreviate to "the Guru".