He didn't, and he wouldn't. Ever.
Ron Paul was caught between the Tenth Amendment and the Second Amendment on the "gun lawsuits" issue. Ron Paul is certainly not in favor of the idiotic Gun Lawsuits, mind you, as he made clear in his Speech on the floor... but he believes (correctly, IMHO) that the Second Amendment applies to the Federal Congress, and that the Federal Congress has no right whatsoever to legislate on Guns one way or the other -- whether to Ban guns, or to tell the States how to run their business.
If Ron Paul had his way, the only Gun Laws would be those enacted by the States... and soon enough, New York and California would ban Guns entirely, while Texas would probably allow "open-carry" on the city streets.
Needless to say, New York and California would wither on the vine, while Texans would retain their Rights.
Ron Paul is okay with this. He does not support State restrictions on Guns, but in this case he went with the Tenth Amendment -- "Thou shalt not make a FEDERAL ISSUE out of a State's Rights question".