I don't know, I've never heard that.
Forgot to get back to this.
http://www.faa.gov/about/office_org...s/techops/navservices/gnss/faq/laas/?print=go
What is GLS?
According to FAA Order 8260.19, Flight Procedures and Airspace GBAS Landing System (GLS) is the FAA's official term for a GBAS instrument approach procedure. The term GLS appears on every GBAS approach chart.
What is the difference between GBAS and GLS?
GBAS is the name of the navigation system which provides precision GBAS corrections from a ground-based transmitter. GBAS corrections can provide position, navigation, and precision approach services. GLS is the name assigned to the instrument approach procedure/capability provided by GBAS.
http://fsims.faa.gov/wdocs/8900.1/v05 airman cert/chapter 02/05_002_009rev1.htm
2) Practical Test. The Instrument Rating ACS or practical test standards (PTS), as appropriate, requires an applicant to be tested on three different kinds of instrument approaches, consisting of one precision approach and two nonprecision approaches. The precision approach may be an instrument landing system (ILS) approach, or a Global Positioning System (GPS) Landing System (GLS) approach. A precision approach radar (PAR) is not authorized as a precision approach on the practical test. Additionally, although localizer performance with vertical guidance (LPV) is technically not considered a precision approach, it can be used as a precision approach if the decision altitude (DA) is equal to or less than 300 feet height above touchdown (HAT)
Also, unlike a tradition approach plate that will have an ILS and a LOC on the same approach plate, you will never see an LPV on the same plate as an LP. Usually a plate will have LPV, LNAV/VNAV, LNAV. If the plate has an LP, you may see it as LP, LNAV - but nothing with a glideslope.