This name is a synonym of Gerbera ambigua (Cass.) Sch.Bip..
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 2ACBC185-77D9-455C-9CFA-CB95B21BCA74).
This name record (from TICA) was not included in version 1 of The Plant List. It is possible the same name was included from a different data source, to check this you can search for Gerbera welwitschii in version 1 of The Plant List.