The Clear Stream 4 is primarily a UHF antenna.
If you want to receive WGTV, you need a VHF antenna and it needs to deal with the problem of adjacent channel interference from CH-7 WCIQ.
A Winegard YA-1713 or Antennacraft Y-10713 aimed at 80° mag. should give you the needed increase in WGTV signal while reducing the relative strength of WCIQ. (This would still allow for reception of WCIQ).
A passive
UVSJ would allow you to combine the UHF and VHF signals into a common down-lead.