My ideas:
 + GTIN is a product/package number there is a search engine for registered GTINs at: http://gepir.gs1.org/v32/xx/gtin.aspx?Lang=en-US
 + GTIN sizes can be 8, 12, 13 or 14 digits
 + www.whit3r4bbi7.com has the Mysql port open which is rather strange, also FTP and SSL ports are open
 + Going to http://www.whit3r4bbi7.com:443/ renders a error message but the server name seems to be "sharedip-192186242104.prod.phx3.secureserver.net"
 + 192186242104 is a valid GTIB without information
 + Image from @whit3r4bbi7 does not seem to fit any know QR format, it is 13x13
 + The X in the first hint maybe mark a long number where each digit is the number of spaces between X that whould give the sequence:
 2/3 - 0 - 2 - 1 -2 - 3 -13 - 6 - 5 - 4/(2-1) - 2 - 3 - 3 - 5 - 1