gif2png doesn't fix the problem does it? (Score 1)

I'm no lawyer, but aren't you just as liable to pay any licensing fees after using gif2png as you were before? It's not the gif itself that means you have to pay, but the way the gif was generated.

Using gif2png may help you avoid detection, but you still used an unlicensed gif-generator at some point in the image's past.

Alternatively, if you have perfectly legal gifs, you may use gif2png as a form of protest...