Hello,
On the official website tspgecet, it says the certificate verification is in july 2019. But they don't have any dates mentioned. This is all the information mentionedd on the official website. So we can expect it to start anytime soon.
To know more about your query, go through the link below-
https://www.tspgecet.co.in/ts-pgecet-counselling/#TS_PGECET_Counselling_Dates_2019_8211_pgecetadmtscheacin
Good Luck!