TS = Titleist Speed
GT = Grand Titleist
GT = Gilded Titleist (I see gold)
GT = G-Force Titleist (The hollow metal "trampoline effect" with the impact of the club face on the ball. This in effect increased the collision time between the club face and the ball (although still very short in the order of micro-seconds), which increases the efficiency of energy transfer, resulting in higher ball speeds. lol

It sounds like a car....

Geothermal Technology

Stands for "Game technology".

Generation Titleist is my best guess...

Get 10,000! or Ten thousand.

“Got Titleist”

Generational.

I think the consensus is Grand Tourer but following TS & TSR then I think Grand Titleist

Apparently it stands for Generational Technology so there must be a big change in performance to match those claims

Grand Tourer

It doesn't doesn't mean a darned thing 'til I get to hit it!

Gopher Trouble

Goes Tons

Grand Touring or Grand Tour. Titleist produces quality products that hold their value and do not need to come out with a product every year.

God of Thunder

will the next range be GTI?

Graphene Technology

Generation Tour

I have to go with the consensus, Grand Touring.