Gmod won't download

for some reason when i try to reinstall gmod it always says “The steam servers are too busy to handle your request. Please try again in a few minutes” I have been trying for weeks to get it installed but it keeps on giving me this message, if anyone knows how to fix this please let me know

Try reinsalling steam See if that works.

And make sure that your connection is not bad quality.
Try lan if you are on WIFI?