Hi @ashishk74,
I suggest using Windows Subsystem for Linux (I use WSL2 on Windows 10).
I just ran the GSN Starter Kit on WSL2 on node v12.14.0 and npm 6.13.4 with no issues.
There is a guide on Using Gas Station Network starter kit on a local network and Using Gas Station Network starter kit on a public testnet
Regards the GSN and Starter Kits please see announcement Doubling down on security