WFS GetFeature request feature with lat/lng literal
Solution 1:
Don't know if you are still needed, but just provides for others who need.
WFS GetFeature request feature with lat/lng literal:
{youHost}/geoserver/wfs?service=WFS&version=1.0.0&request=GetFeature&typeName={yourTypeName}&srsName=EPSG:4326&maxFeatures=10000&format_options=callback:getJson&cql_filter=INTERSECTS(geom, POINT ({long} {lat}))