A problem with tracking many Canadian aircraft is that the first three letters of the registration are often the 3 letter code for an airline. The CGA of C-GABO is the code for Congressional Air.
Looking at the “browse by operator” right now I found the following:
CGT - says its CNG-Transavia, Joint-Stock Company “Transgaz” but when you click on the link it’s actually CGTOG, a Canadian registered C56x.
CGA is supposedly flying right now but clicking on the link shows the flight for CGACA, a BE20.
Walmart, which has its flights blocked, often shows up because its 3 letter code is CGG, the start of the registration of several Canadian aircraft.