Thread count is very important for GSM and cover factor but the GSM and cover factor are also depend on the thread density.
6 Core Issues of Yarn Count and Fabric Density - Testex
Woven fabric construction
Study Material For Textile Testing, PDF, Textiles
Ultra-fine Fiber: Types, Characteristics and Uses - Textile Learner
Thread Count Explained, Best Thread Count for Sheets
Thread Count and Thread Density of Different Types of Woven Fabric
Fabric Thread Density Testing
Analysis of Woven Fabric: Necessity and Importance - Textile Learner
Why Thread Count Matters