Does adding a turbo kit change your gear ratio at all or is it simply to accelerate faster?

Turbos have nothing to do with gear ration. They supply boost to the engine to increase horsepower. Gear ratios are altered via the transmission and gears in the differential.

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Mean GXP Delivered 1/30/2007 $MSRP +$2K

My Stereo Install--> Ultimate AVIC D3 Install thread

Team Solo Performance

Team Solstice 2008

Pioneer Avic D3 - Nav System
JL Audio ZR speakers, Alpine PDX 4.150 amplifier
Solo Performance Street Race exhaust
JPM custom center console, handles and shifter
Painted dash and windshield surround
Custom Valentine1 flush radar display
Debadged rear lettering
K&N Air Filter
OZ Ultraleggera Wheels
DDM Works Big Brake Kit