i need to know how to trade Pokemon on gts after i put Pokemon the offering Pokemon and the Pokemon i wanted but i still cant trade with the Pokemon
NO
yes
You can to a friend wirelessly but not over GTS it will say on the gts "that Pokemon may not be offered for trade"
You can't check what Pokemon are up for trade beforehand.
Get on GTS.
the global trade station
GTS means Global Training Station, you can trade Pokemon with other trainers across the world. Of course you must have WFC to trade.
You should trade on the GTS for your Darkrai in Pokemon X because of Meloetta Genesect.
what like to trade
You can get it through trade or the GTS.
trade on the gts with some one that has it
You can get it in GTS or trade it from Silver or Gold