What do the points GI and GU in the NBA jerseys represent?

The Cavaliers are the "King's Sword" (definitely)

The Celtics are the "Shamrocks" (should be)

The Nets seem to It's "putting the ball in the basket" (it should be)

The Mavericks are the local representative "Mavericks" (it should be)

The Grizzlies don't know

Spurs are "worn on the feet when riding horses" (probably)

Wasps are "bees" (probably)

Rockets are "the initial letters of English ROCKETS" (definitely) )

The Suns are the "Phoenix Suns" (should be)

The Warriors are "San Franciscans (W) Beyond Basketball" (should be)

The Lakers Also "Los Angeles (L) transcends basketball" (should be)