After searching the FAA web site, this is what I came up with:
Airmen Certification: Verify the Authenticity of a Foreign License, Rating, or Medical Certification
http://www.faa.gov/licenses_certific..._verification/
In this case, you are interrested in FAR 61.75. (see below)
Private pilot certificate issued on the basis of a foreign pilot license.
http://ecfr.gpoaccess.gov/cgi/t/text...2.1.10&idno=14
From what I understand of the US system, you get a Private Pilot Licence with a Glider endorsement.
I may be wrong but, my previous comment about contacting TCCA/Licencing still holds.