"gordon" can refer to a number of characters, artists, and other things. Check the current list of gordon* tags to see if there is a more specific one that fits what you are trying to tag.

Some of the more popular tags from that list include...

Characters

• gordon_freeman
• gordon_(pokefound)
• gordon_the_otter
• gordon_(fuze)
• gordon_ramsay
• gordon_(sailewder)
• gordon_shumway
• gordon_quid
• gordon_(thehuskydragon)
• gordon_callahan
• gordon_(ocdraco)
• gordon_(totesfleisch8)

Species

• gordon_setter

Artists

• gordonbleu
• gordonzoo

...but check the complete list if the one you want isn't listed here.