does a 2007 suzuki grand vitaria have 3 cats?

It looks like it does have three. There are catalytic converters in both exhaust manifolds, as well as the exhaust pipe. Whether all three are bad, however, is a different story. In some cases, a professional can isolate the bad converter by measuring inlet and outlet temperatures. Also, a qualified technician may be able to rule out one or more of the cats by monitoring oxygen sensor behavior, and thereby, converter efficiency. If you'd like a second opinion, I suggest contacting one of the shops found here: https://repairpal.com/repair-shops