The gorge of Samaria opened today from the Agia Roumeli side but only for the first 2 km. That brings you roughly just beyond the “Gates” as the narrowest part of the gorge of Samaria is called.
It is still very much the intention of the park authorities to open the gorge of Samaria from Xyloskala (the Omalos plateau entrance) on the 1st of May. There is still a lot of water in the gorge so they think that they might need to build more bridges to cross the river that runs through the gorge than in previous years. They seemed confident that they could do it in time for the official opening on the 1st of May.
As for snow conditions in the mountains, the warm weather of the recent days has melted a lot of snow but important snow fields are still present at fairly low (1500 to 1600m) levels, for example on the way to Gingilos and definitely (in far larger quantities) on the route to the summit of Melindaou.
So if you intend to go to Gingilos or similar in the next couple of weeks bring decent (waterproof) shoes and gaiters, you will need them.