Although OnGameNet and GomTV reached an agreement last month, latest information say that OnGameNet will not stream the games of Global StarCraft 2 League for as of yet unknown reasons.
Yesterday, GosuGamers.net reported that Gretech - the company behind GomTV - and KeSPA did not reach an agreement for the continuation of the Proleague. As OnGameNet is a part of KeSPA it might be possible that they canceled the contract with GomTV.
GomTV announced earlier this week that spectators would need to buy a ticket to watch the provided stream. A season ticket costs $19.95, whereas a VOD ticket, which allows you to watch the VODs during the season, makes $29.95.

Links
Fomos.kr - (Source)
GosuGamers.net - (Additional Information)