Good question! You can use google and find lots. 

For example, https://www.google.com/search?q=stormy+monday+guitar+pro

Go to the first hit (ultime-guitar) and scroll down until you see the Guitar Pro button below the ads.

It says "DOWNLOAD GUITAR PRO TAB"

This probably isn't really what you were looking for as there is a cost involved but... never the less I'm passing it on to you...  - Free membership - Pay per song

MySongbook - https://www.guitar-pro.com/en/index.php?pg=tabs - Associated with Guitar Pro - High quality - Pay per song or full access with subscription
Also check the blog for some free material - https://blog.guitar-pro.com/

Ultimate Guitar - https://www.ultimate-guitar.com/ - free chord sheets and tab with varying degrees of accuracy no membership required - Membership fee needed for 'professionally created' GPX files. - Not to spread rumors but... I sometimes hear support may be minimal and it may be very difficult to cancel a membership! - Just want my MGA friends to be aware

These popped up in Google but I know nothing about them... look like they are free... 

• https://www.guitarprotabs.net/
• https://guitarprotabs.org/

Hope that helps