Not sure if I'll be able to play Gmod on my Laptop?

Right now I only have a Older Laptop to play games on and not sure if I’ll be able to Play Gmod on it?Not sure if it will be Laggy and stuff?couldn’t find any Info on what it takes to be able to play Gmod.

Send me your laptop specs

The lowest ive ever done is 80MB vram, 1 Ghz processor, 768mb RAM
Ran smoothly for the most part but it wont anymore because gmod 13’s framerate has been halved

Minimum:

OS: Windows® Vista/XP/2000
Processor: 1.7 GHz Processor
Memory: 512MB RAM
Graphics: DirectX® 8.1 level Graphics Card (Requires support for SSE)
Hard Drive: 150 MB
Other Requirements: Internet Connection
Recommended:

Processor: Pentium 4 processor (3.0GHz, or better)
Memory: 1GB RAM
Graphics: DirectX® 9 level Graphics Card

This might sound silly but if you have the laptop in your possession and you own garrysmod, cant you just install it and test it? Unless it has cooling issues it wont damage it in any way.