Can't tell if HTC One V is GSM or CDMA
Based from an article on Wikipedia regarding to Electronic Serial Number (ESN),


  ESNs are currently mainly used with CDMA phones (and were previously used by AMPS and TDMA phones), compared to International Mobile Equipment Identity (IMEI) numbers used by all GSM phones.


(Emphasis mine)

So, if there is IMEI, then it's GSM. Otherwise, it's CDMA.

Alternatively, theTuxRacer suggested on the comment


  Remove the back cover on the chin. Under the "Made in China" sticker, there should be a small box which should mention something like HTC One V T320e... They are called as Primou U and Primou C for the GSM and CDMA version respectively!