Actually no (and thanks for asking).
When he was speaker, Democrats filed 84 ethics violations against him. Eighty three were thrown out (sound familiar, Sarah Palin fans?). The last charge had to do with a class he taught at a tax exempt foundation. I assume that's what you are referring to. The complaint accused Gingrich of two tax improprieties: "Failure to seek legal advice" and "providing the committee (that was investigating him)with information which he knew or should have known was inaccurate." The full committee panel did not agree whether tax law had been violated. A settlement was negotiated requiring him to reimburse the committee $300k for the cost of the investigation. Two years later, the IRS cleared him of all charges, but the damage had been done.
I amazes me sometimes, how people will complain and complain about how liberally slated the media is, and then use the media lies like they were facts.