Lebron James -- All Hail The Spelling King ... Sends Swag To Spelling Bee Champ

Game respects game ... at least when it comes to LeBron James ... who was so impressed with the kid who won the 2015 Scripps National Spelling Bee -- that he just sent him a whole bunch of awesome Cavs swag ... TMZ Sports has learned.

The kid who popped up on LeBron's radar -- Gokul Venkatachalam -- is a HUGE Cavaliers fan who rocked a LeBron #23 jersey underneath his button down shirt ... while dominating the spelling bee.

A rep for the Cavs tells us LeBron and the team were so impressed by the performance ... they hooked Gokul up with a pair of Nike Lebron XII's ... inscribed with a personal message from King James ... plus a bunch of team apparel.

We spoke to Gokul, who hasn't yet received the swag ... but says he is "pumped" that LeBron and the team recognized his accomplishment.

Pretty cool, right?