Here is a spec list for a 2000 GT Timberline

BikePedia - Bicycle Value Guide

Bicycle Type Mountain bike, front suspension
MSRP USD (new) $418.00
Weight Unspecified
Sizes 12.5", 14.5", 16", 18", 20", 22"
Colors Black and Tan, British Racing Green
Item ID 45528

Frame & Fork

Frame Construction TIG-welded
Frame Material 7000 aluminum w/replaceable derailleur hanger
Fork SR MG8020
Fork Materal Triple-clamp
Rear Shock Not applicable

Components

Component Group Mountain Mix
Brakeset ProMax linear-pull brakes, aluminum linear-pull levers
Shift Levers SRAM MRX
Front Derailleur Shimano T-300
Rear Derailleur Shimano Acera
Crankset SR XR180
Pedals Resin
Bottom Bracket Shimano cartridge
BB Shell Width Unspecified
Rear Cogs 7-speed Chain Shimano, 1/2 x 3/32"
Seatpost Aluminum micro-adjust
Saddle GT Multi Density ATB
Handlebar Extensions Not included
Handlebars Riser Handlebar Stem ProMax Adjustable alloy
Headset 1 1/8" sealed mechanism

Wheels

Wheel Size Unspecified
Hubs Aluminum,
Q/R Rims Weinmann 519
Front Tire Semi-slick
Rear Tire Not Available
Spoke Brand Stainless steel, 2.0mm straight gauge
Spoke Nipples Brass nipples