Aliasing gundycat → gundypip
Link to alias

Reason:

These two are artist tags for the same artist, with gundycat corresponding to an old alias and gundypip corresponding to the new one.
The artist makes it clear on her FurAffinity that she wishes to be known as GundyPip instead of GundyCat there, but cannot as name changes aren't possible:

Note: My username across all my social media has been changed to GundyPip, and I am now going to be known as that!

All of her social media, except for FurAffinity and Redbubble, have the new alias.

EDIT: The tag alias gundycat -> gundypip (forum #277162) has been approved by @SnowWolf.