This oilseed rape (canola, Brassica napa) is genetically modified using Agrobacterium tumefaciens to make it herbicide tolerant against Monsanto's herbicide glyphosate (Roundup). It contains two different transgenes to confer the herbicide tolerance: cp4 epsps as well as goxv247.
It is produced by Monsanto and marketed as "Westar Roundup Ready". GT73 is synonym with RT73, as which it was registerd in the US.
Austria banned GT73 in January 2006
YieldGard VT PRO.RR2 is a hybrid by Monsanto combining Bt-toxin production and herbicide tolerance against Roundup (glyphosate).
MON89034 produces the Bt toxins Cry1A.105 and Cry2Ab2 against a number of lepidoptera. NK603 is a glyphosate (Roundup) tolerant maize.
For details on the individual events please check the individual entries for MON89034 and NK603.