The Situation's word is his bond -- weeks after the "Jersey Shore" star threatened to sue some guido-themed lifestyle company for ripping off his "GTL" trademark ... his lawyer filed a seething lawsuit to put the company out of business.
TMZ broke the story last weekend ... Sitch fired off a cease and desist letter to a website called MyGTLFuel.com -- which sells everything from energy shots to tanning lotion -- claiming they better quit exploiting his trademark ... or they'd face legal action.
Well, MyGTLFuel hasn't gone anywhere ... so Situation filed suit earlier this week -- asking a judge to force the site to cease all GTL-related operations and destroy any infringing merchandise.
Dana Valentino -- who owns GTL Fuel -- tells TMZ, The Situation has no case -- insisting the "Jersey" star has applied for the "GTL" trademark, but doesn't outright own it ... yet.
Dana says he wants to settle the matter amicably -- but he'll defend his business to the end.
Sues Over Alleged GTL Rip-Off
... TOLDJA SO!
10/16/2011 3:00 AM PDT BY TMZ STAFF
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