I lost my IPad. It has a cell number. Can I locate it with GPS

A lost or stolen iPad cannot be traced or located via its Serial Number or other identifiers. Instead, you must use Apple’s Find My service…

Start here:

Locate a device in Find My on iPad - Apple Support

Here is Apple’s advice for lost or stolen devices:

If your iPhone, iPad or iPod touch is lost or stolen – Apple Support

Use the Find My app to locate a lost or stolen device – Apple Support

If the Find My iPad feature was enabled prior to it being “misplaced”, then if active, you would stand a good chance of locating it. 

However, if the feature was not activated prior to being misplaced - or the iPad has been inactive for more than 24 hours, the last known location will not be available - and the opportunity to use technical means to recover the iPad have been lost.

The only way to locate it is using find my. https://icloud.com/find