**Is your feature request related to a problem? Please describe.** User syncs don't pass gpp strings **Describe the solution you'd like** Gpp strings added to https://github.com/prebid/prebid-universal-creative/blob/master/src/cookieSync.js
Is your feature request related to a problem? Please describe.
User syncs don't pass gpp strings
Describe the solution you'd like
Gpp strings added to https://github.com/prebid/prebid-universal-creative/blob/master/src/cookieSync.js